diff --git a/src/main/generated/com/moplus/moplus_server/domain/problem/domain/childProblem/QChildProblem.java b/src/main/generated/com/moplus/moplus_server/domain/problem/domain/childProblem/QChildProblem.java
index b22ac5b..193076d 100644
--- a/src/main/generated/com/moplus/moplus_server/domain/problem/domain/childProblem/QChildProblem.java
+++ b/src/main/generated/com/moplus/moplus_server/domain/problem/domain/childProblem/QChildProblem.java
@@ -37,8 +37,6 @@ public class QChildProblem extends EntityPathBase<ChildProblem> {
 
     public final StringPath imageUrl = createString("imageUrl");
 
-    public final NumberPath<Integer> sequence = createNumber("sequence", Integer.class);
-
     //inherited
     public final DateTimePath<java.time.LocalDateTime> updatedDate = _super.updatedDate;
 
diff --git a/src/main/generated/com/moplus/moplus_server/domain/problem/domain/problem/QProblem.java b/src/main/generated/com/moplus/moplus_server/domain/problem/domain/problem/QProblem.java
index 74bade6..4850572 100644
--- a/src/main/generated/com/moplus/moplus_server/domain/problem/domain/problem/QProblem.java
+++ b/src/main/generated/com/moplus/moplus_server/domain/problem/domain/problem/QProblem.java
@@ -55,7 +55,7 @@ public class QProblem extends EntityPathBase<Problem> {
 
     public final ListPath<String, StringPath> prescriptionImageUrls = this.<String, StringPath>createList("prescriptionImageUrls", String.class, StringPath.class, PathInits.DIRECT2);
 
-    public final QProblemAdminId problemAdminId;
+    public final QProblemCustomId problemCustomId;
 
     public final EnumPath<ProblemType> problemType = createEnum("problemType", ProblemType.class);
 
@@ -88,7 +88,7 @@ public QProblem(Class<? extends Problem> type, PathMetadata metadata, PathInits
         super(type, metadata, inits);
         this.answer = inits.isInitialized("answer") ? new com.moplus.moplus_server.domain.problem.domain.QAnswer(forProperty("answer")) : null;
         this.difficulty = inits.isInitialized("difficulty") ? new QDifficulty(forProperty("difficulty")) : null;
-        this.problemAdminId = inits.isInitialized("problemAdminId") ? new QProblemAdminId(forProperty("problemAdminId")) : null;
+        this.problemCustomId = inits.isInitialized("problemCustomId") ? new QProblemCustomId(forProperty("problemCustomId")) : null;
         this.title = inits.isInitialized("title") ? new QTitle(forProperty("title")) : null;
     }
 
diff --git a/src/main/generated/com/moplus/moplus_server/domain/problem/domain/problem/QProblemAdminId.java b/src/main/generated/com/moplus/moplus_server/domain/problem/domain/problem/QProblemAdminId.java
deleted file mode 100644
index d7e56ee..0000000
--- a/src/main/generated/com/moplus/moplus_server/domain/problem/domain/problem/QProblemAdminId.java
+++ /dev/null
@@ -1,37 +0,0 @@
-package com.moplus.moplus_server.domain.problem.domain.problem;
-
-import static com.querydsl.core.types.PathMetadataFactory.*;
-
-import com.querydsl.core.types.dsl.*;
-
-import com.querydsl.core.types.PathMetadata;
-import javax.annotation.processing.Generated;
-import com.querydsl.core.types.Path;
-
-
-/**
- * QProblemAdminId is a Querydsl query type for ProblemAdminId
- */
-@Generated("com.querydsl.codegen.DefaultEmbeddableSerializer")
-public class QProblemAdminId extends BeanPath<ProblemAdminId> {
-
-    private static final long serialVersionUID = 348147768L;
-
-    public static final QProblemAdminId problemAdminId = new QProblemAdminId("problemAdminId");
-
-    public final StringPath id = createString("id");
-
-    public QProblemAdminId(String variable) {
-        super(ProblemAdminId.class, forVariable(variable));
-    }
-
-    public QProblemAdminId(Path<? extends ProblemAdminId> path) {
-        super(path.getType(), path.getMetadata());
-    }
-
-    public QProblemAdminId(PathMetadata metadata) {
-        super(ProblemAdminId.class, metadata);
-    }
-
-}
-
diff --git a/src/main/generated/com/moplus/moplus_server/domain/problem/domain/problem/QProblemCustomId.java b/src/main/generated/com/moplus/moplus_server/domain/problem/domain/problem/QProblemCustomId.java
new file mode 100644
index 0000000..896d9cf
--- /dev/null
+++ b/src/main/generated/com/moplus/moplus_server/domain/problem/domain/problem/QProblemCustomId.java
@@ -0,0 +1,37 @@
+package com.moplus.moplus_server.domain.problem.domain.problem;
+
+import static com.querydsl.core.types.PathMetadataFactory.*;
+
+import com.querydsl.core.types.dsl.*;
+
+import com.querydsl.core.types.PathMetadata;
+import javax.annotation.processing.Generated;
+import com.querydsl.core.types.Path;
+
+
+/**
+ * QProblemCustomId is a Querydsl query type for ProblemCustomId
+ */
+@Generated("com.querydsl.codegen.DefaultEmbeddableSerializer")
+public class QProblemCustomId extends BeanPath<ProblemCustomId> {
+
+    private static final long serialVersionUID = -517009730L;
+
+    public static final QProblemCustomId problemCustomId = new QProblemCustomId("problemCustomId");
+
+    public final StringPath id = createString("id");
+
+    public QProblemCustomId(String variable) {
+        super(ProblemCustomId.class, forVariable(variable));
+    }
+
+    public QProblemCustomId(Path<? extends ProblemCustomId> path) {
+        super(path.getType(), path.getMetadata());
+    }
+
+    public QProblemCustomId(PathMetadata metadata) {
+        super(ProblemCustomId.class, metadata);
+    }
+
+}
+
diff --git a/src/main/generated/com/moplus/moplus_server/domain/problem/service/mapper/ChildProblemMapperImpl.java b/src/main/generated/com/moplus/moplus_server/domain/problem/service/mapper/ChildProblemMapperImpl.java
index dc056d0..3909422 100644
--- a/src/main/generated/com/moplus/moplus_server/domain/problem/service/mapper/ChildProblemMapperImpl.java
+++ b/src/main/generated/com/moplus/moplus_server/domain/problem/service/mapper/ChildProblemMapperImpl.java
@@ -10,7 +10,7 @@
 
 @Generated(
     value = "org.mapstruct.ap.MappingProcessor",
-    date = "2025-02-12T02:55:03+0900",
+    date = "2025-02-18T17:01:34+0900",
     comments = "version: 1.6.3, compiler: javac, environment: Java 17.0.10 (JetBrains s.r.o.)"
 )
 @Component
@@ -31,7 +31,6 @@ public ChildProblem from(ChildProblemPostRequest request) {
         if ( set != null ) {
             childProblem.conceptTagIds( new LinkedHashSet<Long>( set ) );
         }
-        childProblem.sequence( request.sequence() );
 
         return childProblem.build();
     }
@@ -44,6 +43,7 @@ public ChildProblem from(ChildProblemUpdateRequest request) {
 
         ChildProblem.ChildProblemBuilder childProblem = ChildProblem.builder();
 
+        childProblem.id( request.id() );
         childProblem.imageUrl( request.imageUrl() );
         childProblem.answerType( request.answerType() );
         childProblem.answer( request.answer() );
@@ -51,7 +51,6 @@ public ChildProblem from(ChildProblemUpdateRequest request) {
         if ( set != null ) {
             childProblem.conceptTagIds( new LinkedHashSet<Long>( set ) );
         }
-        childProblem.sequence( request.sequence() );
 
         return childProblem.build();
     }
diff --git a/src/main/generated/com/moplus/moplus_server/domain/problem/service/mapper/ProblemMapperImpl.java b/src/main/generated/com/moplus/moplus_server/domain/problem/service/mapper/ProblemMapperImpl.java
index dbb174c..2b75c34 100644
--- a/src/main/generated/com/moplus/moplus_server/domain/problem/service/mapper/ProblemMapperImpl.java
+++ b/src/main/generated/com/moplus/moplus_server/domain/problem/service/mapper/ProblemMapperImpl.java
@@ -2,7 +2,7 @@
 
 import com.moplus.moplus_server.domain.problem.domain.practiceTest.PracticeTestTag;
 import com.moplus.moplus_server.domain.problem.domain.problem.Problem;
-import com.moplus.moplus_server.domain.problem.domain.problem.ProblemAdminId;
+import com.moplus.moplus_server.domain.problem.domain.problem.ProblemCustomId;
 import com.moplus.moplus_server.domain.problem.dto.request.ProblemPostRequest;
 import com.moplus.moplus_server.domain.problem.dto.request.ProblemUpdateRequest;
 import java.util.ArrayList;
@@ -14,15 +14,15 @@
 
 @Generated(
     value = "org.mapstruct.ap.MappingProcessor",
-    date = "2025-02-13T19:05:39+0900",
+    date = "2025-02-18T15:29:27+0900",
     comments = "version: 1.6.3, compiler: javac, environment: Java 17.0.10 (JetBrains s.r.o.)"
 )
 @Component
 public class ProblemMapperImpl implements ProblemMapper {
 
     @Override
-    public Problem from(ProblemPostRequest request, ProblemAdminId problemAdminId, PracticeTestTag practiceTestTag) {
-        if ( request == null && problemAdminId == null && practiceTestTag == null ) {
+    public Problem from(ProblemPostRequest request, ProblemCustomId problemCustomId, PracticeTestTag practiceTestTag) {
+        if ( request == null && problemCustomId == null && practiceTestTag == null ) {
             return null;
         }
 
@@ -32,15 +32,15 @@ public Problem from(ProblemPostRequest request, ProblemAdminId problemAdminId, P
             problem.problemType( request.problemType() );
             problem.number( request.number() );
         }
-        problem.problemAdminId( problemAdminId );
+        problem.problemCustomId( problemCustomId );
         problem.practiceTestTag( practiceTestTag );
 
         return problem.build();
     }
 
     @Override
-    public Problem from(ProblemUpdateRequest request, ProblemAdminId problemAdminId, PracticeTestTag practiceTestTag) {
-        if ( request == null && problemAdminId == null && practiceTestTag == null ) {
+    public Problem from(ProblemUpdateRequest request, ProblemCustomId problemCustomId, PracticeTestTag practiceTestTag) {
+        if ( request == null && problemCustomId == null && practiceTestTag == null ) {
             return null;
         }
 
@@ -68,7 +68,7 @@ public Problem from(ProblemUpdateRequest request, ProblemAdminId problemAdminId,
             problem.problemType( request.problemType() );
             problem.number( request.number() );
         }
-        problem.problemAdminId( problemAdminId );
+        problem.problemCustomId( problemCustomId );
         problem.practiceTestTag( practiceTestTag );
 
         return problem.build();
diff --git a/src/main/generated/com/moplus/moplus_server/domain/v0/TestResult/entity/QIncorrectProblem.java b/src/main/generated/com/moplus/moplus_server/domain/v0/TestResult/entity/QIncorrectProblem.java
index b73be8c..9f3b995 100644
--- a/src/main/generated/com/moplus/moplus_server/domain/v0/TestResult/entity/QIncorrectProblem.java
+++ b/src/main/generated/com/moplus/moplus_server/domain/v0/TestResult/entity/QIncorrectProblem.java
@@ -37,7 +37,7 @@ public class QIncorrectProblem extends EntityPathBase<IncorrectProblem> {
 
     public final NumberPath<Long> practiceTestId = createNumber("practiceTestId", Long.class);
 
-    public final NumberPath<Long> problemId = createNumber("problemId", Long.class);
+    public final NumberPath<Long> problemId = createNumber("problemCustomId", Long.class);
 
     public final StringPath problemNumber = createString("problemNumber");
 
diff --git a/src/main/generated/com/moplus/moplus_server/domain/v0/practiceTest/domain/QProblemImageForTest.java b/src/main/generated/com/moplus/moplus_server/domain/v0/practiceTest/domain/QProblemImageForTest.java
index b7e7668..67b69aa 100644
--- a/src/main/generated/com/moplus/moplus_server/domain/v0/practiceTest/domain/QProblemImageForTest.java
+++ b/src/main/generated/com/moplus/moplus_server/domain/v0/practiceTest/domain/QProblemImageForTest.java
@@ -25,7 +25,7 @@ public class QProblemImageForTest extends EntityPathBase<ProblemImageForTest> {
 
     public final StringPath imageUrl = createString("imageUrl");
 
-    public final NumberPath<Long> problemId = createNumber("problemId", Long.class);
+    public final NumberPath<Long> problemId = createNumber("problemCustomId", Long.class);
 
     public QProblemImageForTest(String variable) {
         super(ProblemImageForTest.class, forVariable(variable));
diff --git a/src/main/java/com/moplus/moplus_server/domain/auth/dto/response/AccessTokenResponse.java b/src/main/java/com/moplus/moplus_server/domain/auth/dto/response/AccessTokenResponse.java
index f8d70c2..25f5b8f 100644
--- a/src/main/java/com/moplus/moplus_server/domain/auth/dto/response/AccessTokenResponse.java
+++ b/src/main/java/com/moplus/moplus_server/domain/auth/dto/response/AccessTokenResponse.java
@@ -1,5 +1,9 @@
 package com.moplus.moplus_server.domain.auth.dto.response;
 
+import jakarta.validation.constraints.NotNull;
+
 public record AccessTokenResponse(
-    String accessToken
-) {} 
\ No newline at end of file
+        @NotNull(message = "accessToken을 입력해주세요.")
+        String accessToken
+) {
+}
\ No newline at end of file
diff --git a/src/main/java/com/moplus/moplus_server/domain/concept/controller/ConceptTagController.java b/src/main/java/com/moplus/moplus_server/domain/concept/controller/ConceptTagController.java
index e575025..9670ed7 100644
--- a/src/main/java/com/moplus/moplus_server/domain/concept/controller/ConceptTagController.java
+++ b/src/main/java/com/moplus/moplus_server/domain/concept/controller/ConceptTagController.java
@@ -17,7 +17,7 @@
 @RequiredArgsConstructor
 public class ConceptTagController {
 
-    ConceptTagRepository conceptTagRepository;
+    private final ConceptTagRepository conceptTagRepository;
 
     @GetMapping("")
     @Operation(summary = "모든 개념 태그 리스트 조회")
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/controller/ProblemController.java b/src/main/java/com/moplus/moplus_server/domain/problem/controller/ProblemController.java
index d4acee7..6002770 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/controller/ProblemController.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/controller/ProblemController.java
@@ -3,10 +3,12 @@
 import com.moplus.moplus_server.domain.problem.dto.request.ProblemPostRequest;
 import com.moplus.moplus_server.domain.problem.dto.request.ProblemUpdateRequest;
 import com.moplus.moplus_server.domain.problem.dto.response.ProblemGetResponse;
+import com.moplus.moplus_server.domain.problem.service.ChildProblemService;
 import com.moplus.moplus_server.domain.problem.service.ProblemDeleteService;
 import com.moplus.moplus_server.domain.problem.service.ProblemGetService;
 import com.moplus.moplus_server.domain.problem.service.ProblemSaveService;
 import com.moplus.moplus_server.domain.problem.service.ProblemUpdateService;
+import com.moplus.moplus_server.global.response.IdResponse;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import jakarta.validation.Valid;
@@ -16,6 +18,7 @@
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
@@ -30,6 +33,7 @@ public class ProblemController {
     private final ProblemUpdateService problemUpdateService;
     private final ProblemGetService problemGetService;
     private final ProblemDeleteService problemDeleteService;
+    private final ChildProblemService childProblemService;
 
     @GetMapping("/{id}")
     @Operation(summary = "문항 조회", description = "문항를 조회합니다.")
@@ -40,15 +44,15 @@ public ResponseEntity<ProblemGetResponse> getProblem(
     }
 
     @PostMapping("")
-    @Operation(summary = "문항 생성", description = "문제를 생성합니다. 새끼 문항은 list 순서대로 sequence를 저장합니다.")
-    public ResponseEntity<Long> createProblem(
+    @Operation(summary = "문항 생성", description = "문제를 생성합니다. 기출/변형 문제는 모든 값이 필수이며 창작 문제는 문항 타입만 필수 입니다.")
+    public ResponseEntity<IdResponse> createProblem(
             @Valid @RequestBody ProblemPostRequest request
     ) {
-        return ResponseEntity.ok(problemSaveService.createProblem(request));
+        return ResponseEntity.ok(new IdResponse(problemSaveService.createProblem(request)));
     }
 
-    @PostMapping("/{id}")
-    @Operation(summary = "문항 업데이트", description = "문제를 업데이트합니다. 문항 번호, 모의고사는 수정할 수 없습니다. 새로 추가되는 새끼문항 id는 빈 값입니다.")
+    @PutMapping("/{id}")
+    @Operation(summary = "문항 업데이트", description = "문제를 업데이트합니다. 새끼문항은 들어온 list의 순서로 저장됩니다.")
     public ResponseEntity<ProblemGetResponse> updateProblem(
             @PathVariable("id") Long id,
             @RequestBody ProblemUpdateRequest request
@@ -64,4 +68,22 @@ public ResponseEntity<Void> updateProblem(
         problemDeleteService.deleteProblem(id);
         return ResponseEntity.ok().body(null);
     }
+
+    @PostMapping("/{problemId}/child-problems")
+    @Operation(summary = "새끼문항 추가", description = "추가되는 새끼 문항의 id를 반환합니다. 컨펌 이후에는 새끼 문항 추가가 불가능합니다.")
+    public ResponseEntity<IdResponse> createChildProblem(
+            @PathVariable("problemId") Long problemId
+    ) {
+        return ResponseEntity.ok(new IdResponse(childProblemService.createChildProblem(problemId)));
+    }
+
+    @DeleteMapping("/{problemId}/child-problems/{childProblemId}")
+    @Operation(summary = "새끼 문항 삭제", description = "컨펌 이후에는 새끼 문항 삭제가 불가능합니다.")
+    public ResponseEntity<Void> deleteChildProblem(
+            @PathVariable("problemId") Long problemId,
+            @PathVariable("childProblemId") Long childProblemId
+    ) {
+        childProblemService.deleteChildProblem(problemId, childProblemId);
+        return ResponseEntity.ok().body(null);
+    }
 }
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/controller/ProblemSearchController.java b/src/main/java/com/moplus/moplus_server/domain/problem/controller/ProblemSearchController.java
index 7ec3490..fab72f2 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/controller/ProblemSearchController.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/controller/ProblemSearchController.java
@@ -26,11 +26,12 @@ public class ProblemSearchController {
             description = "문항 ID, 문제명, 개념 태그리스트로 문제를 검색합니다. 개념 태그리스트는 OR 조건으로 검색하며 값이 없으면 쿼리파라미터에서 빼주세요"
     )
     public ResponseEntity<List<ProblemSearchGetResponse>> search(
-            @RequestParam(value = "problemId", required = false) String problemId,
+            @RequestParam(value = "problemCustomId", required = false) String problemCustomId,
             @RequestParam(value = "comment", required = false) String comment,
             @RequestParam(value = "conceptTagIds", required = false) List<Long> conceptTagIds
     ) {
-        List<ProblemSearchGetResponse> problems = problemSearchRepository.search(problemId, comment, conceptTagIds);
+        List<ProblemSearchGetResponse> problems = problemSearchRepository.search(problemCustomId, comment,
+                conceptTagIds);
         return ResponseEntity.ok(problems);
     }
 }
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/domain/childProblem/ChildProblem.java b/src/main/java/com/moplus/moplus_server/domain/problem/domain/childProblem/ChildProblem.java
index f42c2d7..8396008 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/domain/childProblem/ChildProblem.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/domain/childProblem/ChildProblem.java
@@ -40,17 +40,24 @@ public class ChildProblem extends BaseEntity {
     private Answer answer;
     @Enumerated(EnumType.STRING)
     private AnswerType answerType;
-    private int sequence;
 
     @Builder
-    public ChildProblem(String imageUrl, AnswerType answerType, String answer, Set<Long> conceptTagIds,
-                        int sequence) {
+    public ChildProblem(Long id, String imageUrl, AnswerType answerType, String answer, Set<Long> conceptTagIds) {
+        this.id = id;
         validateAnswerByType(answer, answerType);
         this.imageUrl = imageUrl;
         this.answerType = answerType;
         this.answer = new Answer(answer, answerType);
         this.conceptTagIds = conceptTagIds;
-        this.sequence = sequence;
+    }
+
+    public static ChildProblem createEmptyChildProblem() {
+        return ChildProblem.builder()
+                .imageUrl("")
+                .answerType(AnswerType.SHORT_STRING_ANSWER)
+                .answer("")
+                .conceptTagIds(Set.of())
+                .build();
     }
 
     public void validateAnswerByType(String answer, AnswerType answerType) {
@@ -62,11 +69,13 @@ public void validateAnswerByType(String answer, AnswerType answerType) {
     }
 
     public void update(ChildProblem input) {
+        if (this.id != input.id) {
+            throw new InvalidValueException(ErrorCode.INVALID_CHILD_PROBLEM_SEQUENCE);
+        }
         this.imageUrl = input.imageUrl;
         this.answerType = input.answerType;
         this.answer = input.answer;
         this.conceptTagIds = input.conceptTagIds;
-        this.sequence = input.sequence;
     }
 
     public String getAnswer() {
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/Problem.java b/src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/Problem.java
index bc3f96b..2b08fad 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/Problem.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/Problem.java
@@ -5,6 +5,8 @@
 import com.moplus.moplus_server.domain.problem.domain.practiceTest.PracticeTestTag;
 import com.moplus.moplus_server.domain.problem.repository.converter.StringListConverter;
 import com.moplus.moplus_server.global.common.BaseEntity;
+import com.moplus.moplus_server.global.error.exception.ErrorCode;
+import com.moplus.moplus_server.global.error.exception.InvalidValueException;
 import jakarta.persistence.CascadeType;
 import jakarta.persistence.CollectionTable;
 import jakarta.persistence.Column;
@@ -20,9 +22,8 @@
 import jakarta.persistence.Id;
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.OneToMany;
-import jakarta.persistence.OrderBy;
+import jakarta.persistence.OrderColumn;
 import java.util.ArrayList;
-import java.util.Comparator;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
@@ -37,7 +38,7 @@
 public class Problem extends BaseEntity {
 
     @Embedded
-    ProblemAdminId problemAdminId;
+    ProblemCustomId problemCustomId;
     Long practiceTestId;
     int number;
     @Enumerated(EnumType.STRING)
@@ -76,7 +77,7 @@ public class Problem extends BaseEntity {
 
     @OneToMany(cascade = CascadeType.ALL, orphanRemoval = true, fetch = FetchType.LAZY)
     @JoinColumn(name = "problem_id")
-    @OrderBy("sequence ASC")
+    @OrderColumn(name = "sequence")
     private List<ChildProblem> childProblems = new ArrayList<>();
 
     @Builder
@@ -85,7 +86,7 @@ public Problem(List<ChildProblem> childProblems, boolean isConfirmed, AnswerType
                    List<String> prescriptionImageUrls, String seniorTipImageUrl, String readingTipImageUrl,
                    String mainAnalysisImageUrl, String mainProblemImageUrl, String memo, String answer, String title,
                    ProblemType problemType, int number, PracticeTestTag practiceTestTag,
-                   ProblemAdminId problemAdminId) {
+                   ProblemCustomId problemCustomId) {
         this.childProblems = childProblems;
         this.isConfirmed = isConfirmed;
         this.answerType = answerType;
@@ -103,22 +104,15 @@ public Problem(List<ChildProblem> childProblems, boolean isConfirmed, AnswerType
         this.problemType = problemType;
         this.number = number;
         this.practiceTestId = practiceTestTag.getId();
-        this.problemAdminId = problemAdminId;
+        this.problemCustomId = problemCustomId;
     }
 
     public String getAnswer() {
         return answer.getValue();
     }
 
-    public void addChildProblem(List<ChildProblem> inputChildProblems) {
-        List<ChildProblem> mutableChildProblems = new ArrayList<>(inputChildProblems);
-        mutableChildProblems.sort(Comparator.comparingInt(ChildProblem::getSequence));
-        mutableChildProblems.forEach(childProblems::add);
-        mutableChildProblems.forEach(childProblem -> conceptTagIds.addAll(childProblem.getConceptTagIds()));
-    }
-
     public void update(Problem inputProblem) {
-        this.problemAdminId = inputProblem.getProblemAdminId();
+        this.problemCustomId = inputProblem.getProblemCustomId();
         this.practiceTestId = inputProblem.getPracticeTestId();
         this.number = inputProblem.getNumber();
         this.problemType = inputProblem.getProblemType();
@@ -134,33 +128,20 @@ public void update(Problem inputProblem) {
         this.seniorTipImageUrl = inputProblem.getSeniorTipImageUrl();
         this.prescriptionImageUrls = inputProblem.getPrescriptionImageUrls();
         this.answerType = inputProblem.getAnswerType();
-        this.isConfirmed = inputProblem.isConfirmed();
     }
 
     public void updateChildProblem(List<ChildProblem> inputChildProblems) {
-        inputChildProblems.forEach(childProblem -> {
-            this.childProblems.stream()
-                    .filter(existingChildProblem -> existingChildProblem.getId().equals(childProblem.getId()))
-                    .findFirst()
-                    .ifPresentOrElse(
-                            existingChildProblem -> {
-                                existingChildProblem.update(childProblem);
-                                conceptTagIds.addAll(existingChildProblem.getConceptTagIds());
-                            },
-                            () -> {
-                                childProblems.add(childProblem);
-                                conceptTagIds.addAll(childProblem.getConceptTagIds());
-                            }
-                    );
-        });
-    }
-
-    public void deleteChildProblem(List<Long> deleteChildProblems) {
-        childProblems.removeIf(childProblem -> deleteChildProblems.contains(childProblem.getId()));
+        if (isConfirmed && this.childProblems.size() != inputChildProblems.size()) {
+            throw new InvalidValueException(ErrorCode.INVALID_CHILD_PROBLEM_SIZE);
+        }
+        
+        for (int i = 0; i < inputChildProblems.size(); i++) {
+            this.childProblems.get(i).update(inputChildProblems.get(i));
+        }
     }
 
     public boolean isValid() {
-        return problemAdminId != null
+        return problemCustomId != null
                 && practiceTestId != null
                 && problemType != null
                 && title != null && !title.getTitle().isEmpty()
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemAdminIdService.java b/src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemAdminIdService.java
index 8c61f9f..d447346 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemAdminIdService.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemAdminIdService.java
@@ -22,7 +22,7 @@ public class ProblemAdminIdService {
         NN : 번호 (01~99)
         XX : 2자리 sequence 숫자
      */
-    public ProblemAdminId nextId(int number, PracticeTestTag practiceTestTag, ProblemType problemType) {
+    public ProblemCustomId nextId(int number, PracticeTestTag practiceTestTag, ProblemType problemType) {
 
         int problemTypeCode = problemType.getCode(); // C (문제 타입)
         int subject = practiceTestTag.getSubject().getCode(); // S (과목)
@@ -37,8 +37,8 @@ public ProblemAdminId nextId(int number, PracticeTestTag practiceTestTag, Proble
             sequence = SEQUENCE.getAndIncrement() % 100; // 000~999 순환
             generatedId = String.format("%d%d%02d%02d%02d%02d",
                     problemTypeCode, subject, year, month, number, sequence);
-        } while (problemRepository.existsByProblemAdminId(new ProblemAdminId(generatedId))); // ID가 이미 존재하면 재생성
+        } while (problemRepository.existsByProblemCustomId(new ProblemCustomId(generatedId))); // ID가 이미 존재하면 재생성
 
-        return new ProblemAdminId(generatedId);
+        return new ProblemCustomId(generatedId);
     }
 }
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemAdminId.java b/src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemCustomId.java
similarity index 71%
rename from src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemAdminId.java
rename to src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemCustomId.java
index 7c04c6e..85648be 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemAdminId.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemCustomId.java
@@ -10,12 +10,12 @@
 @Getter
 @Embeddable
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
-public class ProblemAdminId implements Serializable {
+public class ProblemCustomId implements Serializable {
 
-    @Column(name = "problem_admin_id", nullable = false)
+    @Column(name = "problem_custom_id")
     private String id;
 
-    public ProblemAdminId(String id) {
+    public ProblemCustomId(String id) {
         this.id = id;
     }
 }
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/dto/request/ChildProblemUpdateRequest.java b/src/main/java/com/moplus/moplus_server/domain/problem/dto/request/ChildProblemUpdateRequest.java
index 19ba8ff..c791a80 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/dto/request/ChildProblemUpdateRequest.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/dto/request/ChildProblemUpdateRequest.java
@@ -1,16 +1,13 @@
 package com.moplus.moplus_server.domain.problem.dto.request;
 
 import com.moplus.moplus_server.domain.problem.domain.problem.AnswerType;
-import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.Set;
 
 public record ChildProblemUpdateRequest(
-        @Schema(description = "새로 생성되는 새끼문항은 빈 값입니다.")
         Long id,
         String imageUrl,
         AnswerType answerType,
         String answer,
-        Set<Long> conceptTagIds,
-        int sequence
+        Set<Long> conceptTagIds
 ) {
 }
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/dto/request/ProblemPostRequest.java b/src/main/java/com/moplus/moplus_server/domain/problem/dto/request/ProblemPostRequest.java
index 0933dec..94f597f 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/dto/request/ProblemPostRequest.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/dto/request/ProblemPostRequest.java
@@ -2,7 +2,7 @@
 
 import com.moplus.moplus_server.domain.problem.domain.practiceTest.PracticeTestTag;
 import com.moplus.moplus_server.domain.problem.domain.problem.Problem;
-import com.moplus.moplus_server.domain.problem.domain.problem.ProblemAdminId;
+import com.moplus.moplus_server.domain.problem.domain.problem.ProblemCustomId;
 import com.moplus.moplus_server.domain.problem.domain.problem.ProblemType;
 import jakarta.validation.constraints.NotNull;
 
@@ -12,9 +12,9 @@ public record ProblemPostRequest(
         Long practiceTestId,
         int number
 ) {
-    public Problem toEntity(PracticeTestTag practiceTestTag, ProblemAdminId problemAdminId) {
+    public Problem toEntity(PracticeTestTag practiceTestTag, ProblemCustomId problemCustomId) {
         return Problem.builder()
-                .problemAdminId(problemAdminId)
+                .problemCustomId(problemCustomId)
                 .practiceTestTag(practiceTestTag)
                 .number(number)
                 .title("")
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/dto/request/ProblemUpdateRequest.java b/src/main/java/com/moplus/moplus_server/domain/problem/dto/request/ProblemUpdateRequest.java
index c55fb83..a4d0971 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/dto/request/ProblemUpdateRequest.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/dto/request/ProblemUpdateRequest.java
@@ -23,7 +23,6 @@ public record ProblemUpdateRequest(
         String seniorTipImageUrl,
         List<String> prescriptionImageUrls,
         AnswerType answerType,
-        List<ChildProblemUpdateRequest> updateChildProblems,
-        List<Long> deleteChildProblems
+        List<ChildProblemUpdateRequest> updateChildProblems
 ) {
 }
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/dto/response/ProblemGetResponse.java b/src/main/java/com/moplus/moplus_server/domain/problem/dto/response/ProblemGetResponse.java
index 650189b..6354dda 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/dto/response/ProblemGetResponse.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/dto/response/ProblemGetResponse.java
@@ -10,8 +10,10 @@
 
 @Builder
 public record ProblemGetResponse(
-        @NotNull(message = "문항 ID은 필수입니다")
-        String problemId,
+        @NotNull(message = "문항 ID 필수입니다")
+        Long id,
+        @NotNull(message = "문항 custom ID는 필수입니다")
+        String problemCustomId,
         Set<Long> conceptTagIds,
         Long practiceTestId,
         int number,
@@ -31,8 +33,10 @@ public record ProblemGetResponse(
 ) {
 
     public static ProblemGetResponse of(Problem problem) {
+
         return ProblemGetResponse.builder()
-                .problemId(problem.getProblemAdminId().getId())
+                .id(problem.getId())
+                .problemCustomId(problem.getProblemCustomId().getId())
                 .conceptTagIds(problem.getConceptTagIds())
                 .practiceTestId(problem.getPracticeTestId())
                 .number(problem.getNumber())
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/repository/ProblemRepository.java b/src/main/java/com/moplus/moplus_server/domain/problem/repository/ProblemRepository.java
index 6f62f77..4529f68 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/repository/ProblemRepository.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/repository/ProblemRepository.java
@@ -1,14 +1,14 @@
 package com.moplus.moplus_server.domain.problem.repository;
 
 import com.moplus.moplus_server.domain.problem.domain.problem.Problem;
-import com.moplus.moplus_server.domain.problem.domain.problem.ProblemAdminId;
+import com.moplus.moplus_server.domain.problem.domain.problem.ProblemCustomId;
 import com.moplus.moplus_server.global.error.exception.ErrorCode;
 import com.moplus.moplus_server.global.error.exception.NotFoundException;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface ProblemRepository extends JpaRepository<Problem, Long> {
 
-    boolean existsByProblemAdminId(ProblemAdminId problemAdminId);
+    boolean existsByProblemCustomId(ProblemCustomId problemCustomId);
 
     default void existsByIdElseThrow(Long id) {
         if (!existsById(id)) {
@@ -16,8 +16,8 @@ default void existsByIdElseThrow(Long id) {
         }
     }
 
-    default void existsByProblemAdminIdElseThrow(ProblemAdminId problemAdminId) {
-        if (!existsByProblemAdminId(problemAdminId)) {
+    default void existsByProblemAdminIdElseThrow(ProblemCustomId problemCustomId) {
+        if (!existsByProblemCustomId(problemCustomId)) {
             throw new NotFoundException(ErrorCode.PROBLEM_NOT_FOUND);
         }
     }
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/repository/ProblemSearchRepositoryCustom.java b/src/main/java/com/moplus/moplus_server/domain/problem/repository/ProblemSearchRepositoryCustom.java
index b2ff859..9c57fd1 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/repository/ProblemSearchRepositoryCustom.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/repository/ProblemSearchRepositoryCustom.java
@@ -21,7 +21,7 @@ public class ProblemSearchRepositoryCustom {
 
     public List<ProblemSearchGetResponse> search(String problemId, String comment, List<Long> conceptTagIds) {
         return queryFactory
-                .select(problem.problemAdminId.id, problem.memo, problem.mainProblemImageUrl)
+                .select(problem.problemCustomId.id, problem.memo, problem.mainProblemImageUrl)
                 .from(problem)
                 .where(
                         containsProblemId(problemId),
@@ -32,7 +32,7 @@ public List<ProblemSearchGetResponse> search(String problemId, String comment, L
                 .distinct()
                 .transform(GroupBy.groupBy(problem.id).list(
                         Projections.constructor(ProblemSearchGetResponse.class,
-                                problem.problemAdminId.id,
+                                problem.problemCustomId.id,
                                 problem.memo,
                                 problem.mainProblemImageUrl,
                                 GroupBy.set(
@@ -45,10 +45,10 @@ public List<ProblemSearchGetResponse> search(String problemId, String comment, L
                 ));
     }
 
-    //problemId 일부 포함 검색
+    //problemCustomId 일부 포함 검색
     private BooleanExpression containsProblemId(String problemId) {
         return (problemId == null || problemId.isEmpty()) ? null
-                : problem.problemAdminId.id.containsIgnoreCase(problemId);
+                : problem.problemCustomId.id.containsIgnoreCase(problemId);
     }
 
     //name 조건 (포함 검색)
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/service/ChildProblemService.java b/src/main/java/com/moplus/moplus_server/domain/problem/service/ChildProblemService.java
new file mode 100644
index 0000000..d4e7a43
--- /dev/null
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/service/ChildProblemService.java
@@ -0,0 +1,38 @@
+package com.moplus.moplus_server.domain.problem.service;
+
+import com.moplus.moplus_server.domain.problem.domain.childProblem.ChildProblem;
+import com.moplus.moplus_server.domain.problem.domain.problem.Problem;
+import com.moplus.moplus_server.domain.problem.repository.ChildProblemRepository;
+import com.moplus.moplus_server.domain.problem.repository.ProblemRepository;
+import com.moplus.moplus_server.global.error.exception.ErrorCode;
+import com.moplus.moplus_server.global.error.exception.InvalidValueException;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@RequiredArgsConstructor
+public class ChildProblemService {
+
+    private final ProblemRepository problemRepository;
+    private final ChildProblemRepository childProblemRepository;
+
+    @Transactional
+    public Long createChildProblem(Long problemId) {
+        Problem problem = problemRepository.findByIdElseThrow(problemId);
+        if (problem.isConfirmed()) {
+            throw new InvalidValueException(ErrorCode.CHILD_PROBLEM_UPDATE_AFTER_CONFIRMED);
+        }
+
+        return childProblemRepository.save(ChildProblem.createEmptyChildProblem()).getId();
+    }
+
+    @Transactional
+    public void deleteChildProblem(Long problemId, Long childProblemId) {
+        Problem problem = problemRepository.findByIdElseThrow(problemId);
+        if (problem.isConfirmed()) {
+            throw new InvalidValueException(ErrorCode.CHILD_PROBLEM_UPDATE_AFTER_CONFIRMED);
+        }
+        childProblemRepository.deleteById(childProblemId);
+    }
+}
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/service/ImageUploadService.java b/src/main/java/com/moplus/moplus_server/domain/problem/service/ImageUploadService.java
index 9617adf..6ba2888 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/service/ImageUploadService.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/service/ImageUploadService.java
@@ -1,7 +1,7 @@
 package com.moplus.moplus_server.domain.problem.service;
 
 import com.amazonaws.HttpMethod;
-import com.moplus.moplus_server.domain.problem.domain.problem.ProblemAdminId;
+import com.moplus.moplus_server.domain.problem.domain.problem.ProblemCustomId;
 import com.moplus.moplus_server.domain.problem.domain.problem.ProblemImageType;
 import com.moplus.moplus_server.domain.problem.repository.ProblemRepository;
 import com.moplus.moplus_server.global.utils.s3.S3Util;
@@ -18,7 +18,7 @@ public class ImageUploadService {
     private final ProblemRepository problemRepository;
 
     public String generateProblemImagePresignedUrl(String problemId, ProblemImageType imageType) {
-        problemRepository.existsByProblemAdminIdElseThrow(new ProblemAdminId(problemId));
+        problemRepository.existsByProblemAdminIdElseThrow(new ProblemCustomId(problemId));
         String fileName = generateProblemImageFileName(problemId, imageType);
         return s3Util.getS3PresignedUrl(fileName, HttpMethod.PUT);
     }
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/service/ProblemSaveService.java b/src/main/java/com/moplus/moplus_server/domain/problem/service/ProblemSaveService.java
index a6f6679..24ea2f9 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/service/ProblemSaveService.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/service/ProblemSaveService.java
@@ -2,8 +2,8 @@
 
 import com.moplus.moplus_server.domain.problem.domain.practiceTest.PracticeTestTag;
 import com.moplus.moplus_server.domain.problem.domain.problem.Problem;
-import com.moplus.moplus_server.domain.problem.domain.problem.ProblemAdminId;
 import com.moplus.moplus_server.domain.problem.domain.problem.ProblemAdminIdService;
+import com.moplus.moplus_server.domain.problem.domain.problem.ProblemCustomId;
 import com.moplus.moplus_server.domain.problem.dto.request.ProblemPostRequest;
 import com.moplus.moplus_server.domain.problem.repository.PracticeTestTagRepository;
 import com.moplus.moplus_server.domain.problem.repository.ProblemRepository;
@@ -24,10 +24,10 @@ public class ProblemSaveService {
     @Transactional
     public Long createProblem(ProblemPostRequest request) {
         PracticeTestTag practiceTestTag = practiceTestRepository.findByIdElseThrow(request.practiceTestId());
-        ProblemAdminId problemAdminId = problemAdminIdService.nextId(request.number(), practiceTestTag,
+        ProblemCustomId problemCustomId = problemAdminIdService.nextId(request.number(), practiceTestTag,
                 request.problemType());
 
-        Problem problem = problemMapper.from(request, problemAdminId, practiceTestTag);
+        Problem problem = problemMapper.from(request, problemCustomId, practiceTestTag);
 
         return problemRepository.save(problem).getId();
     }
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/service/ProblemUpdateService.java b/src/main/java/com/moplus/moplus_server/domain/problem/service/ProblemUpdateService.java
index 81f1086..423fd3b 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/service/ProblemUpdateService.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/service/ProblemUpdateService.java
@@ -4,12 +4,10 @@
 import com.moplus.moplus_server.domain.problem.domain.childProblem.ChildProblem;
 import com.moplus.moplus_server.domain.problem.domain.practiceTest.PracticeTestTag;
 import com.moplus.moplus_server.domain.problem.domain.problem.Problem;
-import com.moplus.moplus_server.domain.problem.domain.problem.ProblemAdminId;
 import com.moplus.moplus_server.domain.problem.domain.problem.ProblemAdminIdService;
-import com.moplus.moplus_server.domain.problem.dto.request.ChildProblemUpdateRequest;
+import com.moplus.moplus_server.domain.problem.domain.problem.ProblemCustomId;
 import com.moplus.moplus_server.domain.problem.dto.request.ProblemUpdateRequest;
 import com.moplus.moplus_server.domain.problem.dto.response.ProblemGetResponse;
-import com.moplus.moplus_server.domain.problem.repository.ChildProblemRepository;
 import com.moplus.moplus_server.domain.problem.repository.PracticeTestTagRepository;
 import com.moplus.moplus_server.domain.problem.repository.ProblemRepository;
 import com.moplus.moplus_server.domain.problem.service.mapper.ChildProblemMapper;
@@ -27,7 +25,6 @@ public class ProblemUpdateService {
     private final ProblemAdminIdService problemAdminIdService;
     private final PracticeTestTagRepository practiceTestRepository;
     private final ConceptTagRepository conceptTagRepository;
-    private final ChildProblemRepository childProblemRepository;
     private final ChildProblemMapper childProblemMapper;
     private final ProblemMapper problemMapper;
 
@@ -37,12 +34,11 @@ public ProblemGetResponse updateProblem(Long problemId, ProblemUpdateRequest req
         conceptTagRepository.existsByIdElseThrow(request.conceptTagIds());
         Problem problem = problemRepository.findByIdElseThrow(problemId);
 
-        ProblemAdminId problemAdminId = problemAdminIdService.nextId(request.number(), practiceTestTag,
+        ProblemCustomId problemCustomId = problemAdminIdService.nextId(request.number(), practiceTestTag,
                 request.problemType());
 
-        Problem inputProblem = problemMapper.from(request, problemAdminId, practiceTestTag);
+        Problem inputProblem = problemMapper.from(request, problemCustomId, practiceTestTag);
         problem.update(inputProblem);
-        problem.deleteChildProblem(request.deleteChildProblems());
 
         List<ChildProblem> childProblems = changeToChildProblems(request);
         problem.updateChildProblem(childProblems);
@@ -52,16 +48,7 @@ public ProblemGetResponse updateProblem(Long problemId, ProblemUpdateRequest req
 
     private List<ChildProblem> changeToChildProblems(ProblemUpdateRequest request) {
         return request.updateChildProblems().stream()
-                .map(this::getChildProblem)
+                .map(childProblemMapper::from)
                 .toList();
     }
-
-    private ChildProblem getChildProblem(ChildProblemUpdateRequest updateChildProblem) {
-        if (updateChildProblem.id() == null) {
-            return childProblemMapper.from(updateChildProblem);
-        }
-        ChildProblem childProblem = childProblemRepository.findByIdElseThrow(updateChildProblem.id());
-        childProblem.update(childProblemMapper.from(updateChildProblem));
-        return childProblem;
-    }
 }
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/service/mapper/ChildProblemMapper.java b/src/main/java/com/moplus/moplus_server/domain/problem/service/mapper/ChildProblemMapper.java
index d8a6566..e2deb5a 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/service/mapper/ChildProblemMapper.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/service/mapper/ChildProblemMapper.java
@@ -4,11 +4,13 @@
 import com.moplus.moplus_server.domain.problem.dto.request.ChildProblemPostRequest;
 import com.moplus.moplus_server.domain.problem.dto.request.ChildProblemUpdateRequest;
 import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
 
 @Mapper(componentModel = "spring")
 public interface ChildProblemMapper {
 
     ChildProblem from(ChildProblemPostRequest request);
 
+    @Mapping(target = "id", source = "id")
     ChildProblem from(ChildProblemUpdateRequest request);
 }
diff --git a/src/main/java/com/moplus/moplus_server/domain/problem/service/mapper/ProblemMapper.java b/src/main/java/com/moplus/moplus_server/domain/problem/service/mapper/ProblemMapper.java
index 5497c41..354ab5b 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problem/service/mapper/ProblemMapper.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problem/service/mapper/ProblemMapper.java
@@ -2,7 +2,7 @@
 
 import com.moplus.moplus_server.domain.problem.domain.practiceTest.PracticeTestTag;
 import com.moplus.moplus_server.domain.problem.domain.problem.Problem;
-import com.moplus.moplus_server.domain.problem.domain.problem.ProblemAdminId;
+import com.moplus.moplus_server.domain.problem.domain.problem.ProblemCustomId;
 import com.moplus.moplus_server.domain.problem.dto.request.ProblemPostRequest;
 import com.moplus.moplus_server.domain.problem.dto.request.ProblemUpdateRequest;
 import org.mapstruct.Mapper;
@@ -13,14 +13,14 @@
 public interface ProblemMapper {
 
     @Mappings({
-            @Mapping(target = "problemAdminId", source = "problemAdminId"),
+            @Mapping(target = "problemCustomId", source = "problemCustomId"),
             @Mapping(target = "practiceTestTag", source = "practiceTestTag"),
     })
-    Problem from(ProblemPostRequest request, ProblemAdminId problemAdminId, PracticeTestTag practiceTestTag);
+    Problem from(ProblemPostRequest request, ProblemCustomId problemCustomId, PracticeTestTag practiceTestTag);
 
     @Mappings({
-            @Mapping(target = "problemAdminId", source = "problemAdminId"),
+            @Mapping(target = "problemCustomId", source = "problemCustomId"),
             @Mapping(target = "practiceTestTag", source = "practiceTestTag"),
     })
-    Problem from(ProblemUpdateRequest request, ProblemAdminId problemAdminId, PracticeTestTag practiceTestTag);
+    Problem from(ProblemUpdateRequest request, ProblemCustomId problemCustomId, PracticeTestTag practiceTestTag);
 }
diff --git a/src/main/java/com/moplus/moplus_server/domain/problemset/controller/ProblemSetController.java b/src/main/java/com/moplus/moplus_server/domain/problemset/controller/ProblemSetController.java
index f38a715..0b8296e 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problemset/controller/ProblemSetController.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problemset/controller/ProblemSetController.java
@@ -9,6 +9,7 @@
 import com.moplus.moplus_server.domain.problemset.service.ProblemSetGetService;
 import com.moplus.moplus_server.domain.problemset.service.ProblemSetSaveService;
 import com.moplus.moplus_server.domain.problemset.service.ProblemSetUpdateService;
+import com.moplus.moplus_server.global.response.IdResponse;
 import io.swagger.v3.oas.annotations.Hidden;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
@@ -36,10 +37,10 @@ public class ProblemSetController {
 
     @PostMapping("")
     @Operation(summary = "문항세트 생성", description = "문항세트를 생성합니다. 문항은 요청 순서대로 저장합니다.")
-    public ResponseEntity<Long> createProblemSet(
+    public ResponseEntity<IdResponse> createProblemSet(
             @RequestBody ProblemSetPostRequest request
     ) {
-        return ResponseEntity.ok(problemSetSaveService.createProblemSet(request));
+        return ResponseEntity.ok(new IdResponse(problemSetSaveService.createProblemSet(request)));
     }
 
     @Hidden
diff --git a/src/main/java/com/moplus/moplus_server/domain/problemset/domain/ProblemSet.java b/src/main/java/com/moplus/moplus_server/domain/problemset/domain/ProblemSet.java
index 7a99cfd..ee5fa4f 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problemset/domain/ProblemSet.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problemset/domain/ProblemSet.java
@@ -35,6 +35,7 @@ public class ProblemSet extends BaseEntity {
 
     @Embedded
     private Title title;
+
     @Column(nullable = false)
     private boolean isDeleted;
 
@@ -68,7 +69,7 @@ public void toggleConfirm(List<Problem> problems) {
         if (this.confirmStatus == ProblemSetConfirmStatus.NOT_CONFIRMED) {
             List<String> invalidProblemIds = problems.stream()
                     .filter(problem -> !problem.isValid())
-                    .map(problem -> problem.getProblemAdminId().getId())
+                    .map(problem -> problem.getProblemCustomId().getId())
                     .toList();
             if (!invalidProblemIds.isEmpty()) {
                 String message = ErrorCode.INVALID_CONFIRM_PROBLEM.getMessage() +
diff --git a/src/main/java/com/moplus/moplus_server/domain/problemset/dto/response/ProblemSummaryResponse.java b/src/main/java/com/moplus/moplus_server/domain/problemset/dto/response/ProblemSummaryResponse.java
index 78ce956..4c28056 100644
--- a/src/main/java/com/moplus/moplus_server/domain/problemset/dto/response/ProblemSummaryResponse.java
+++ b/src/main/java/com/moplus/moplus_server/domain/problemset/dto/response/ProblemSummaryResponse.java
@@ -16,7 +16,7 @@ public record ProblemSummaryResponse(
     public static ProblemSummaryResponse of(Problem problem, String practiceTestName, List<String> tagNames) {
 
         return ProblemSummaryResponse.builder()
-                .problemId(problem.getProblemAdminId().getId())
+                .problemId(problem.getProblemCustomId().getId())
                 .number(problem.getNumber())
                 .memo(problem.getMemo())
                 .mainProblemImageUrl(problem.getMainProblemImageUrl())
diff --git a/src/main/java/com/moplus/moplus_server/domain/publish/controller/PublishController.java b/src/main/java/com/moplus/moplus_server/domain/publish/controller/PublishController.java
index 0415f17..ddd8728 100644
--- a/src/main/java/com/moplus/moplus_server/domain/publish/controller/PublishController.java
+++ b/src/main/java/com/moplus/moplus_server/domain/publish/controller/PublishController.java
@@ -5,6 +5,7 @@
 import com.moplus.moplus_server.domain.publish.service.PublishDeleteService;
 import com.moplus.moplus_server.domain.publish.service.PublishGetService;
 import com.moplus.moplus_server.domain.publish.service.PublishSaveService;
+import com.moplus.moplus_server.global.response.IdResponse;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import jakarta.validation.Valid;
@@ -40,10 +41,10 @@ public ResponseEntity<List<PublishMonthGetResponse>> getPublishMonth(
 
     @PostMapping("")
     @Operation(summary = "발행 생성하기", description = "특정 날짜에 문항세트를 발행합니다.")
-    public ResponseEntity<Long> postPublish(
+    public ResponseEntity<IdResponse> postPublish(
             @Valid @RequestBody PublishPostRequest request
     ) {
-        return ResponseEntity.ok(publishSaveService.createPublish(request));
+        return ResponseEntity.ok(new IdResponse(publishSaveService.createPublish(request)));
     }
 
     @DeleteMapping("/{publishId}")
diff --git a/src/main/java/com/moplus/moplus_server/global/config/WebConfig.java b/src/main/java/com/moplus/moplus_server/global/config/WebConfig.java
index 1663f45..784551f 100644
--- a/src/main/java/com/moplus/moplus_server/global/config/WebConfig.java
+++ b/src/main/java/com/moplus/moplus_server/global/config/WebConfig.java
@@ -3,6 +3,7 @@
 import com.moplus.moplus_server.global.annotation.AuthenticationArgumentResolver;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.scheduling.annotation.EnableScheduling;
 import org.springframework.transaction.annotation.EnableTransactionManagement;
@@ -17,13 +18,13 @@
 public class WebConfig implements WebMvcConfigurer {
 
     private final AuthenticationArgumentResolver authenticationArgumentResolver;
+    @Value("${cors-allowed-origins}")
+    private List<String> corsAllowedOrigins;
 
     @Override
     public void addCorsMappings(CorsRegistry registry) {
         registry.addMapping("/**")
-                .allowedOrigins("https://dev.mopl.kr", "http://dev.mopl.kr", "http://localhost:8080",
-                        "https://www.mopl.kr", "http"
-                                + "://localhost:3000", "https://dev-web.mopl.kr", "http://dev-web.mopl.kr")
+                .allowedOrigins(corsAllowedOrigins.toArray(new String[0]))
                 .allowedMethods("GET", "POST", "PUT", "DELETE", "OPTIONS")
                 .allowedHeaders("*")
                 .allowCredentials(true);
diff --git a/src/main/java/com/moplus/moplus_server/global/error/exception/ErrorCode.java b/src/main/java/com/moplus/moplus_server/global/error/exception/ErrorCode.java
index 199a216..f3c83b2 100644
--- a/src/main/java/com/moplus/moplus_server/global/error/exception/ErrorCode.java
+++ b/src/main/java/com/moplus/moplus_server/global/error/exception/ErrorCode.java
@@ -37,6 +37,10 @@ public enum ErrorCode {
 
     //새끼 문항
     CHILD_PROBLEM_NOT_FOUND(HttpStatus.NOT_FOUND, "해당 새끼 문제를 찾을 수 없습니다"),
+    CHILD_PROBLEM_UPDATE_AFTER_CONFIRMED(HttpStatus.BAD_REQUEST, "컨펌 후 문제는 수정할 수 없습니다"),
+    INVALID_CHILD_PROBLEM_SEQUENCE(HttpStatus.BAD_REQUEST, "새끼 문제의 업데이트 순서가 일치하지 않습니다."),
+    INVALID_CHILD_PROBLEM_SIZE(HttpStatus.BAD_REQUEST, "새끼 문제의 업데이트 개수가 일치하지 않습니다."),
+
 
     //개념태그
     CONCEPT_TAG_NOT_FOUND_IN_LIST(HttpStatus.NOT_FOUND, "해당 리스트 중 존재하지 않는 개념 태그가 있습니다."),
diff --git a/src/main/java/com/moplus/moplus_server/global/response/IdResponse.java b/src/main/java/com/moplus/moplus_server/global/response/IdResponse.java
new file mode 100644
index 0000000..8c44006
--- /dev/null
+++ b/src/main/java/com/moplus/moplus_server/global/response/IdResponse.java
@@ -0,0 +1,6 @@
+package com.moplus.moplus_server.global.response;
+
+public record IdResponse(
+        Long id
+) {
+}
diff --git a/src/main/java/com/moplus/moplus_server/global/response/ResponseDto.java b/src/main/java/com/moplus/moplus_server/global/response/ResponseDto.java
deleted file mode 100644
index 545e075..0000000
--- a/src/main/java/com/moplus/moplus_server/global/response/ResponseDto.java
+++ /dev/null
@@ -1,20 +0,0 @@
-package com.moplus.moplus_server.global.response;
-
-import com.fasterxml.jackson.annotation.JsonInclude;
-import com.moplus.moplus_server.global.error.ErrorResponse;
-import org.springframework.http.HttpStatus;
-
-@JsonInclude(JsonInclude.Include.NON_NULL)
-public record ResponseDto<T>(
-        T data,
-        String message,
-        HttpStatus status
-) {
-    public static <T> ResponseDto<T> success(final T data) {
-        return new ResponseDto<>(data, null, null);
-    }
-
-    public static <T> ResponseDto<T> fail(ErrorResponse errorResponse) {
-        return new ResponseDto<>(null, errorResponse.getMessage(), errorResponse.getStatus());
-    }
-}
\ No newline at end of file
diff --git a/src/main/java/com/moplus/moplus_server/global/response/ResponseDtoAdvice.java b/src/main/java/com/moplus/moplus_server/global/response/ResponseDtoAdvice.java
deleted file mode 100644
index af24122..0000000
--- a/src/main/java/com/moplus/moplus_server/global/response/ResponseDtoAdvice.java
+++ /dev/null
@@ -1,39 +0,0 @@
-package com.moplus.moplus_server.global.response;
-
-import com.moplus.moplus_server.global.error.ErrorResponse;
-import com.moplus.moplus_server.global.error.exception.ErrorCode;
-import org.springframework.core.MethodParameter;
-import org.springframework.http.MediaType;
-import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
-import org.springframework.http.server.ServerHttpRequest;
-import org.springframework.http.server.ServerHttpResponse;
-import org.springframework.web.bind.annotation.RestControllerAdvice;
-import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;
-
-@RestControllerAdvice(
-        basePackages = "com.moplus.moplus_server"
-)
-
-public class ResponseDtoAdvice implements ResponseBodyAdvice<Object> {
-
-    @Override
-    public boolean supports(MethodParameter returnType, Class converterType) {
-        return !(returnType.getParameterType() == ResponseDto.class)
-                && MappingJackson2HttpMessageConverter.class.isAssignableFrom(converterType);
-    }
-
-    @Override
-    public Object beforeBodyWrite(
-            Object body,
-            MethodParameter returnType,
-            MediaType selectedContentType,
-            Class selectedConverterType,
-            ServerHttpRequest request,
-            ServerHttpResponse response
-    ) {
-        if (body instanceof ErrorResponse) {
-            return ResponseDto.fail((ErrorResponse) body);
-        }
-        return ResponseDto.success(body);
-    }
-}
diff --git a/src/main/resources/templates/imageUploadPage.html b/src/main/resources/templates/imageUploadPage.html
index 59fe602..d26dcd4 100644
--- a/src/main/resources/templates/imageUploadPage.html
+++ b/src/main/resources/templates/imageUploadPage.html
@@ -22,7 +22,7 @@ <h2>문제 이미지 업로드</h2>
         <!-- 반복문으로 문제 리스트 출력 -->
         <th:block th:each="problemForTest : ${problemImageRequests}">
             <tr>
-                <td th:text="${problemForTest.problemAdminId}">문제 ID</td>
+                <td th:text="${problemForTest.problemCustomId}">문제 ID</td>
                 <td th:text="${problemForTest.problemNumber}">문제 번호</td>
                 <td>
                     <!-- 이미지 URL이 있는 경우 이미지를 표시 -->
@@ -34,7 +34,7 @@ <h2>문제 이미지 업로드</h2>
                 <td>
                     <!-- 업로드 버튼 -->
                     <form enctype="multipart/form-data" method="post"
-                          th:action="'/admin/practiceTests/uploadImage/' + ${problemForTest.problemAdminId}">
+                          th:action="'/admin/practiceTests/uploadImage/' + ${problemForTest.problemCustomId}">
                         <input accept="image/*" answerType="file" name="image">
                         <input answerType="hidden" name="practiceTestId" th:value="${practiceTestId}">
                         <button answerType="submit" class="upload-button">업로드</button>
diff --git a/src/test/java/com/moplus/moplus_server/domain/member/controller/MemberControllerTest.java b/src/test/java/com/moplus/moplus_server/domain/member/controller/MemberControllerTest.java
index 3d3622d..2ce90a3 100644
--- a/src/test/java/com/moplus/moplus_server/domain/member/controller/MemberControllerTest.java
+++ b/src/test/java/com/moplus/moplus_server/domain/member/controller/MemberControllerTest.java
@@ -70,9 +70,9 @@ public void setMockMvc() throws Exception {
                             .contentType("application/json")
                             .header(HttpHeaders.AUTHORIZATION, "Bearer " + validToken))
                     .andExpect(status().isOk()) // 200 응답 확인
-                    .andExpect(jsonPath("$.data.id").exists()) // MemberGetResponse의 필드 확인
-                    .andExpect(jsonPath("$.data.name").exists())
-                    .andExpect(jsonPath("$.data.email").exists());
+                    .andExpect(jsonPath("$.id").exists()) // MemberGetResponse의 필드 확인
+                    .andExpect(jsonPath("$.name").exists())
+                    .andExpect(jsonPath("$.email").exists());
         }
     }
 }
\ No newline at end of file
diff --git a/src/test/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemAdminIdServiceTest.java b/src/test/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemCustomIdServiceTest.java
similarity index 83%
rename from src/test/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemAdminIdServiceTest.java
rename to src/test/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemCustomIdServiceTest.java
index 184e71c..00c0f57 100644
--- a/src/test/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemAdminIdServiceTest.java
+++ b/src/test/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemCustomIdServiceTest.java
@@ -19,7 +19,7 @@
 import org.mockito.junit.jupiter.MockitoExtension;
 
 @ExtendWith(MockitoExtension.class)
-class ProblemAdminIdServiceTest {
+class ProblemCustomIdServiceTest {
 
     public static final String ID_LENGTH = "10";
     @Mock
@@ -43,10 +43,10 @@ void setUp() {
         // given
         int 문제번호 = 20;
         ProblemType problemType = ProblemType.GICHUL_PROBLEM;
-        when(problemRepository.existsByProblemAdminId(any())).thenReturn(false); // 중복 없음
+        when(problemRepository.existsByProblemCustomId(any())).thenReturn(false); // 중복 없음
 
         // when
-        ProblemAdminId generatedId = problemAdminIdService.nextId(문제번호, practiceTestTag, problemType);
+        ProblemCustomId generatedId = problemAdminIdService.nextId(문제번호, practiceTestTag, problemType);
 
         // then
         assertThat(generatedId).isNotNull();
@@ -54,7 +54,7 @@ void setUp() {
         assertThat(generatedId.getId()).startsWith("12240520");
 
         // 문제 ID 중복 확인을 위해 existsById 호출 확인
-        verify(problemRepository, atLeastOnce()).existsByProblemAdminId(any());
+        verify(problemRepository, atLeastOnce()).existsByProblemCustomId(any());
 
     }
 
@@ -63,12 +63,12 @@ void setUp() {
         // given
         int 문제번호 = 2;
         ProblemType problemType = ProblemType.GICHUL_PROBLEM;
-        when(problemRepository.existsByProblemAdminId(any()))
+        when(problemRepository.existsByProblemCustomId(any()))
                 .thenReturn(true)  // 첫 번째 생성된 ID는 중복됨
                 .thenReturn(false); // 두 번째는 중복 없음
 
         // when
-        ProblemAdminId generatedId = problemAdminIdService.nextId(문제번호, practiceTestTag, problemType);
+        ProblemCustomId generatedId = problemAdminIdService.nextId(문제번호, practiceTestTag, problemType);
 
         // then
         assertThat(generatedId).isNotNull();
@@ -76,6 +76,6 @@ void setUp() {
         assertThat(generatedId.getId()).startsWith("12240502");
 
         // 중복된 ID가 나왔으므로 existsById가 최소 두 번 이상 호출되었는지 확인
-        verify(problemRepository, atLeast(2)).existsByProblemAdminId(any());
+        verify(problemRepository, atLeast(2)).existsByProblemCustomId(any());
     }
 }
\ No newline at end of file
diff --git a/src/test/java/com/moplus/moplus_server/domain/problem/service/ProblemUpdateServiceTest.java b/src/test/java/com/moplus/moplus_server/domain/problem/service/ProblemUpdateServiceTest.java
index 6760214..9b9145d 100644
--- a/src/test/java/com/moplus/moplus_server/domain/problem/service/ProblemUpdateServiceTest.java
+++ b/src/test/java/com/moplus/moplus_server/domain/problem/service/ProblemUpdateServiceTest.java
@@ -6,7 +6,7 @@
 import com.moplus.moplus_server.domain.problem.domain.childProblem.ChildProblem;
 import com.moplus.moplus_server.domain.problem.domain.problem.AnswerType;
 import com.moplus.moplus_server.domain.problem.domain.problem.Problem;
-import com.moplus.moplus_server.domain.problem.domain.problem.ProblemAdminId;
+import com.moplus.moplus_server.domain.problem.domain.problem.ProblemCustomId;
 import com.moplus.moplus_server.domain.problem.domain.problem.ProblemType;
 import com.moplus.moplus_server.domain.problem.dto.request.ChildProblemUpdateRequest;
 import com.moplus.moplus_server.domain.problem.dto.request.ProblemUpdateRequest;
@@ -15,7 +15,6 @@
 import com.moplus.moplus_server.global.error.exception.NotFoundException;
 import java.util.List;
 import java.util.Set;
-import java.util.stream.IntStream;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
@@ -37,35 +36,29 @@ class ProblemUpdateServiceTest {
     @Autowired
     private ProblemRepository problemRepository;
 
-    private ProblemAdminId problemAdminId;
+    private ProblemCustomId problemCustomId;
     private ProblemUpdateRequest problemUpdateRequest;
 
     @BeforeEach
     void setUp() {
-        problemAdminId = new ProblemAdminId("240520012001");
-
-        //  새 자식 문제 추가
-        ChildProblemUpdateRequest newChildProblem = new ChildProblemUpdateRequest(
-                null,
-                "newChild.png",
-                AnswerType.SHORT_STRING_ANSWER,
-                "새로운 정답",
-                Set.of(1L, 2L),
-                1
-        );
+        problemCustomId = new ProblemCustomId("240520012001");
 
         //  기존 자식 문제 업데이트
-        ChildProblemUpdateRequest updateChildProblem = new ChildProblemUpdateRequest(
-                1L, // 기존 자식 문제 ID
-                "updatedChild.png",
+        ChildProblemUpdateRequest updateChildProblem1 = new ChildProblemUpdateRequest(
+                1L,
+                "updatedChild1.png",
                 AnswerType.MULTIPLE_CHOICE,
                 "2",
-                Set.of(2L, 3L),
-                0
+                Set.of(2L, 3L)
         );
 
-        //  기존 자식 문제 삭제
-        List<Long> deleteChildProblem = List.of(2L); // 삭제할 자식 문제 ID
+        ChildProblemUpdateRequest updateChildProblem2 = new ChildProblemUpdateRequest(
+                2L,
+                "updatedChild2.png",
+                AnswerType.SHORT_STRING_ANSWER,
+                "23",
+                Set.of(3L, 4L)
+        );
 
         problemUpdateRequest = new ProblemUpdateRequest(
                 ProblemType.VARIANT_PROBLEM,
@@ -83,8 +76,7 @@ void setUp() {
                 "updatedSeniorTip.png",
                 List.of("prescription1.png", "prescription2.png"), // List<String>으로 변경
                 AnswerType.SHORT_STRING_ANSWER,
-                List.of(newChildProblem, updateChildProblem),
-                deleteChildProblem
+                List.of(updateChildProblem1, updateChildProblem2)
         );
     }
 
@@ -99,7 +91,7 @@ class 문제_업데이트_정상_동작 {
 
             // then
             assertThat(response).isNotNull();
-            assertThat(response.problemId()).startsWith("22230310"); //  문제 ID 확인
+            assertThat(response.problemCustomId()).startsWith("22230310"); //  문제 ID 확인
             assertThat(response.problemType()).isEqualTo(ProblemType.VARIANT_PROBLEM);
             assertThat(response.practiceTestId()).isEqualTo(2L);
             assertThat(response.number()).isEqualTo(10);
@@ -126,35 +118,21 @@ class 문제_업데이트_정상_동작 {
 
             // 자식 문제 검증
             List<ChildProblem> childProblems = updatedProblem.getChildProblems();
-            assertThat(childProblems).hasSize(2); // 기존 2개 → 1개 삭제, 1개 추가 후 2개
+            assertThat(childProblems).hasSize(2);
 
             // 첫 번째 자식 문제 검증 (업데이트된 기존 문제)
             ChildProblem updatedChild = childProblems.get(0);
-            assertThat(updatedChild.getId()).isEqualTo(1L);
-            assertThat(updatedChild.getImageUrl()).isEqualTo("updatedChild.png");
+            assertThat(updatedChild.getImageUrl()).isEqualTo("updatedChild1.png");
             assertThat(updatedChild.getAnswerType()).isEqualTo(AnswerType.MULTIPLE_CHOICE);
             assertThat(updatedChild.getAnswer()).isEqualTo("2");
             assertThat(updatedChild.getConceptTagIds()).containsExactlyInAnyOrderElementsOf(Set.of(2L, 3L));
-            assertThat(updatedChild.getSequence()).isEqualTo(0);
 
             // 두 번째 자식 문제 검증 (새로 추가된 문제)
             ChildProblem newChild = childProblems.get(1);
-            assertThat(newChild.getImageUrl()).isEqualTo("newChild.png");
+            assertThat(newChild.getImageUrl()).isEqualTo("updatedChild2.png");
             assertThat(newChild.getAnswerType()).isEqualTo(AnswerType.SHORT_STRING_ANSWER);
-            assertThat(newChild.getAnswer()).isEqualTo("새로운 정답");
-            assertThat(newChild.getConceptTagIds()).containsExactlyInAnyOrderElementsOf(Set.of(1L, 2L));
-            assertThat(newChild.getSequence()).isEqualTo(1);
-
-            // 부모 문제의 conceptTagIds가 자식 문제의 conceptTagIds를 모두 포함하는지 검증
-            Set<Long> problemTags = updatedProblem.getConceptTagIds();
-            childProblems.forEach(child -> {
-                assertThat(problemTags).containsAll(child.getConceptTagIds());
-            });
-
-            // 자식 문제 순서가 올바르게 정렬되었는지 확인
-            IntStream.range(0, childProblems.size()).forEach(i -> {
-                assertThat(childProblems.get(i).getSequence()).isEqualTo(i);
-            });
+            assertThat(newChild.getAnswer()).isEqualTo("23");
+            assertThat(newChild.getConceptTagIds()).containsExactlyInAnyOrderElementsOf(Set.of(3L, 4L));
         }
     }
 
@@ -190,7 +168,6 @@ class 문제_업데이트_예외_처리 {
                     "updatedSeniorTip.png",
                     List.of("prescription1.png"), // List<String>으로 변경
                     AnswerType.SHORT_STRING_ANSWER,
-                    List.of(),
                     List.of()
             );
 
diff --git a/src/test/resources/insert-problem.sql b/src/test/resources/insert-problem.sql
index add8767..03bc152 100644
--- a/src/test/resources/insert-problem.sql
+++ b/src/test/resources/insert-problem.sql
@@ -1,5 +1,5 @@
 INSERT INTO problem (problem_id,
-                     problem_admin_id,
+                     problem_custom_id,
                      practice_test_id,
                      number,
                      problem_type,
@@ -28,7 +28,7 @@ INSERT INTO child_problem (child_problem_id,
                            answer,
                            sequence)
 VALUES (1, 1, 'child1.png', 'MULTIPLE_CHOICE', '1', 0),
-       (2, 1, 'child2.png', 'SHORT_STRING_ANSWER', '정답2', 0);
+       (2, 1, 'child2.png', 'SHORT_STRING_ANSWER', '정답2', 1);
 
 -- 문제-컨셉 태그 연결 (기존 문제의 ConceptTag)
 INSERT INTO problem_concept (problem_id, -- Long 타입으로 변경 (Problem의 id 참조)
diff --git a/src/test/resources/insert-problem2.sql b/src/test/resources/insert-problem2.sql
index b999009..75f6573 100644
--- a/src/test/resources/insert-problem2.sql
+++ b/src/test/resources/insert-problem2.sql
@@ -1,6 +1,6 @@
 -- problem 데이터 삽입
 INSERT INTO problem (problem_id,
-                     problem_admin_id,
+                     problem_custom_id,
                      practice_test_id,
                      number,
                      problem_type,
@@ -62,7 +62,7 @@ VALUES (1, 1),
 
 -- 유효하지 않은 문제 데이터 삽입
 INSERT INTO problem (problem_id,
-                     problem_admin_id,
+                     problem_custom_id,
                      practice_test_id,
                      number,
                      problem_type,