diff --git a/src/main/java/com/petlog/diary/controller/DiaryController.java b/src/main/java/com/petlog/diary/controller/DiaryController.java
index 73c76da..b7eab4c 100644
--- a/src/main/java/com/petlog/diary/controller/DiaryController.java
+++ b/src/main/java/com/petlog/diary/controller/DiaryController.java
@@ -8,7 +8,6 @@
 import com.petlog.diary.controller.dto.response.GetDiaryResponseDto;
 import com.petlog.diary.service.DiaryService;
 import com.petlog.diary.service.dto.CreateDiaryDto;
-import com.petlog.diary.service.dto.GetDailyDiaryDto;
 import com.petlog.diary.service.dto.GetDiaryInfoDto;
 import com.petlog.docs.DiaryControllerDocs;
 import lombok.RequiredArgsConstructor;
@@ -59,18 +58,11 @@ public ResponseEntity<ApiResponse<Void>> createDiary(
 
     @GetMapping
     public ResponseEntity<ApiResponse<GetAllDiaryResponseDto>> getAllDiary(
+        @Authenticated final Long memberId,
         @PathVariable final Long groupId
     ) {
-        final List<GetDiaryInfoDto> dailyDiary1 = List.of(
-            new GetDiaryInfoDto(1L, "잠자는 아이", "https://잠자는 여름이.png"),
-            new GetDiaryInfoDto(2L, "날뛰는 아이", "https://날뛰는 여름이.png")
-        );
-
-        final GetDailyDiaryDto dailyDiary = new GetDailyDiaryDto(LocalDate.now(), dailyDiary1);
-
-        final List<GetDailyDiaryDto> allDailyDiary = List.of(dailyDiary);
-
-        final GetAllDiaryResponseDto allDiary = new GetAllDiaryResponseDto(allDailyDiary);
+        final List<GetDiaryInfoDto> diaries = diaryService.getAllDiaries(memberId, groupId);
+        final GetAllDiaryResponseDto allDiary = GetAllDiaryResponseDto.from(diaries);
 
         return ResponseEntity.ok(
             ApiResponse.successWithData(GET_ALL_DIARY, allDiary)
diff --git a/src/main/java/com/petlog/diary/controller/dto/response/GetAllDiaryResponseDto.java b/src/main/java/com/petlog/diary/controller/dto/response/GetAllDiaryResponseDto.java
index abd69b3..3eabb34 100644
--- a/src/main/java/com/petlog/diary/controller/dto/response/GetAllDiaryResponseDto.java
+++ b/src/main/java/com/petlog/diary/controller/dto/response/GetAllDiaryResponseDto.java
@@ -1,15 +1,34 @@
 package com.petlog.diary.controller.dto.response;
 
 import com.petlog.diary.service.dto.GetDailyDiaryDto;
+import com.petlog.diary.service.dto.GetDiaryInfoDto;
 
+import java.util.Comparator;
 import java.util.List;
+import java.util.stream.Collectors;
 
 public record GetAllDiaryResponseDto(
 
-    List<GetDailyDiaryDto> allDiary
+    List<GetDailyDiaryDto> diary
 
 ) {
-    public GetAllDiaryResponseDto(final List<GetDailyDiaryDto> allDiary) {
-        this.allDiary = allDiary;
+
+    public static GetAllDiaryResponseDto from(List<GetDiaryInfoDto> diaryList) {
+
+        List<GetDailyDiaryDto> grouped =
+            diaryList.stream()
+                .collect(Collectors.groupingBy(GetDiaryInfoDto::writtenAt))
+                .entrySet()
+                .stream()
+                .map(entry ->
+                    new GetDailyDiaryDto(
+                        entry.getKey(),
+                        entry.getValue()
+                    )
+                )
+                .sorted(Comparator.comparing(GetDailyDiaryDto::writtenAt).reversed())
+                .toList();
+
+        return new GetAllDiaryResponseDto(grouped);
     }
 }
diff --git a/src/main/java/com/petlog/diary/repository/DiaryRepository.java b/src/main/java/com/petlog/diary/repository/DiaryRepository.java
index 7638c68..c1b54fc 100644
--- a/src/main/java/com/petlog/diary/repository/DiaryRepository.java
+++ b/src/main/java/com/petlog/diary/repository/DiaryRepository.java
@@ -1,7 +1,12 @@
 package com.petlog.diary.repository;
 
 import com.petlog.diary.entity.Diary;
+import com.petlog.petgroup.entity.PetGroup;
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.util.List;
+
 public interface DiaryRepository extends JpaRepository<Diary, Long> {
+
+    List<Diary> findAllByPetGroup(PetGroup petGroup);
 }
diff --git a/src/main/java/com/petlog/diary/service/DiaryService.java b/src/main/java/com/petlog/diary/service/DiaryService.java
index b6ab88f..f7136ec 100644
--- a/src/main/java/com/petlog/diary/service/DiaryService.java
+++ b/src/main/java/com/petlog/diary/service/DiaryService.java
@@ -5,6 +5,7 @@
 import com.petlog.diary.repository.DiaryImageRepository;
 import com.petlog.diary.repository.DiaryRepository;
 import com.petlog.diary.service.dto.CreateDiaryDto;
+import com.petlog.diary.service.dto.GetDiaryInfoDto;
 import com.petlog.member.entity.Member;
 import com.petlog.member.repository.MemberRepository;
 import com.petlog.petgroup.entity.PetGroup;
@@ -62,4 +63,24 @@ private PetGroupMember getPetGroupMember(final Member member, final PetGroup pet
         return petGroupMemberRepository.findByMemberAndPetGroup(member, petGroup)
             .orElseThrow(() -> new IllegalArgumentException("그룹에 존재하지 않는 회원입니다."));
     }
+
+    public List<GetDiaryInfoDto> getAllDiaries(final Long memberId, final Long groupId) {
+        final Member member = getMember(memberId);
+        final PetGroup petGroup = getPetGroup(groupId);
+        getPetGroupMember(member, petGroup);
+
+        final List<Diary> diaries = diaryRepository.findAllByPetGroup(petGroup);
+
+        return diaries.stream()
+            .map(info -> new GetDiaryInfoDto(
+                info.getId(),
+                info.getTitle(),
+                info.getImages().stream()
+                    .findFirst()
+                    .map(DiaryImage::getImageUrl)
+                    .orElse(null),
+                info.getWrittenAt()
+            ))
+            .toList();
+    }
 }
diff --git a/src/main/java/com/petlog/diary/service/dto/GetDiaryInfoDto.java b/src/main/java/com/petlog/diary/service/dto/GetDiaryInfoDto.java
index 89c3eb5..0e9501a 100644
--- a/src/main/java/com/petlog/diary/service/dto/GetDiaryInfoDto.java
+++ b/src/main/java/com/petlog/diary/service/dto/GetDiaryInfoDto.java
@@ -2,6 +2,8 @@
 
 import io.swagger.v3.oas.annotations.media.Schema;
 
+import java.time.LocalDate;
+
 public record GetDiaryInfoDto(
 
     Long diaryId,
@@ -9,16 +11,9 @@ public record GetDiaryInfoDto(
     @Schema(description = "10글자 제한")
     String title,
 
-    String image
+    String image,
+
+    LocalDate writtenAt
 
 ) {
-    public GetDiaryInfoDto(
-        final Long diaryId,
-        final String title,
-        final String image
-    ) {
-        this.diaryId = diaryId;
-        this.title = title;
-        this.image = image;
-    }
 }
diff --git a/src/main/java/com/petlog/docs/DiaryControllerDocs.java b/src/main/java/com/petlog/docs/DiaryControllerDocs.java
index c054676..a1c21f2 100644
--- a/src/main/java/com/petlog/docs/DiaryControllerDocs.java
+++ b/src/main/java/com/petlog/docs/DiaryControllerDocs.java
@@ -21,7 +21,7 @@ public interface DiaryControllerDocs {
 
     @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "200", description = "일기 전체 조회에 성공하였습니다.")
     @Operation(summary = "일기 전체 조회 API")
-    ResponseEntity<ApiResponse<GetAllDiaryResponseDto>> getAllDiary(@PathVariable final Long groupId);
+    ResponseEntity<ApiResponse<GetAllDiaryResponseDto>> getAllDiary(@Authenticated final Long memberId, @PathVariable final Long groupId);
 
     @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "200", description = "일기 상세 조회에 성공하였습니다.")
     @Operation(summary = "일기 상세 조회 API")