diff --git a/build.gradle b/build.gradle
index 26f3aeb2..fa277c10 100644
--- a/build.gradle
+++ b/build.gradle
@@ -41,16 +41,17 @@ dependencies {
     implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.8.3'
 	implementation 'org.springframework.boot:spring-boot-starter-webflux'
 
-	//MQTT
 	implementation 'org.springframework.boot:spring-boot-starter-integration'
-	implementation 'org.springframework.integration:spring-integration-mqtt'
 
 	implementation 'org.springframework.boot:spring-boot-starter-oauth2-client'
 
-	implementation 'com.google.firebase:firebase-admin:9.2.0'
-
-	implementation 'org.springframework.cloud:spring-cloud-starter-aws:2.2.6.RELEASE'
 	implementation 'org.springframework.cloud:spring-cloud-starter-aws-messaging:2.2.6.RELEASE'
+
+	implementation 'com.squareup.okhttp3:okhttp:4.11.0'
+	implementation 'com.squareup.okhttp3:okhttp-urlconnection:4.11.0'  // 추가
+	// Jsoup (HTML 파싱)
+	implementation 'org.jsoup:jsoup:1.18.1'
+
 }
 
 tasks.named('test') {
diff --git a/src/main/java/com/example/smartair/EnjoyBackApplication.java b/src/main/java/com/example/enjoy/EnjoyBackApplication.java
similarity index 95%
rename from src/main/java/com/example/smartair/EnjoyBackApplication.java
rename to src/main/java/com/example/enjoy/EnjoyBackApplication.java
index ca6f1d03..0adb26b9 100644
--- a/src/main/java/com/example/smartair/EnjoyBackApplication.java
+++ b/src/main/java/com/example/enjoy/EnjoyBackApplication.java
@@ -1,4 +1,4 @@
-package com.example.smartair;
+package com.example.enjoy;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
diff --git a/src/main/java/com/example/smartair/config/RestTemplateConfig.java b/src/main/java/com/example/enjoy/config/RestTemplateConfig.java
similarity index 89%
rename from src/main/java/com/example/smartair/config/RestTemplateConfig.java
rename to src/main/java/com/example/enjoy/config/RestTemplateConfig.java
index 34aad318..8f96169d 100644
--- a/src/main/java/com/example/smartair/config/RestTemplateConfig.java
+++ b/src/main/java/com/example/enjoy/config/RestTemplateConfig.java
@@ -1,13 +1,14 @@
-package com.example.smartair.config;
+package com.example.enjoy.config;
 
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.web.client.RestTemplate;
+
 @Configuration
 public class RestTemplateConfig {
+
     @Bean
     public RestTemplate restTemplate() {
         return new RestTemplate();
     }
 }
-
diff --git a/src/main/java/com/example/enjoy/config/SecurityConfig.java b/src/main/java/com/example/enjoy/config/SecurityConfig.java
new file mode 100644
index 00000000..74b92af6
--- /dev/null
+++ b/src/main/java/com/example/enjoy/config/SecurityConfig.java
@@ -0,0 +1,44 @@
+package com.example.enjoy.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.http.SessionCreationPolicy;
+import org.springframework.security.web.SecurityFilterChain;
+import org.springframework.web.cors.CorsConfiguration;
+import org.springframework.web.cors.CorsConfigurationSource;
+import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
+
+import java.util.Arrays;
+
+@Configuration
+@EnableWebSecurity
+public class SecurityConfig {
+
+    @Bean
+    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
+        http
+                .csrf(csrf -> csrf.disable())
+                .cors(cors -> cors.configurationSource(corsConfigurationSource()))
+                .sessionManagement(session ->
+                        session.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
+                .authorizeHttpRequests(auth -> auth
+                        .anyRequest().permitAll());  // 모든 요청 허용
+
+        return http.build();
+    }
+
+    @Bean
+    public CorsConfigurationSource corsConfigurationSource() {
+        CorsConfiguration configuration = new CorsConfiguration();
+        configuration.setAllowedOrigins(Arrays.asList("http://localhost:3000"));
+        configuration.setAllowedMethods(Arrays.asList("GET", "POST", "PUT", "DELETE", "OPTIONS"));
+        configuration.setAllowedHeaders(Arrays.asList("*"));
+        configuration.setAllowCredentials(true);
+
+        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
+        source.registerCorsConfiguration("/**", configuration);
+        return source;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/example/smartair/config/SwaggerConfig.java b/src/main/java/com/example/enjoy/config/SwaggerConfig.java
similarity index 52%
rename from src/main/java/com/example/smartair/config/SwaggerConfig.java
rename to src/main/java/com/example/enjoy/config/SwaggerConfig.java
index 47df87b3..5ad63887 100644
--- a/src/main/java/com/example/smartair/config/SwaggerConfig.java
+++ b/src/main/java/com/example/enjoy/config/SwaggerConfig.java
@@ -1,4 +1,4 @@
-package com.example.smartair.config;
+package com.example.enjoy.config;
 
 import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.info.Info;
@@ -14,33 +14,31 @@
 public class SwaggerConfig {
     @Bean
     public OpenAPI customOpenAPI() {
-        // Security Scheme 정의
-        SecurityScheme securityScheme = new SecurityScheme()
-                .type(SecurityScheme.Type.HTTP)
-                .scheme("bearer")
-                .bearerFormat("JWT")
+        // API Key Scheme 정의
+        SecurityScheme apiKeyScheme = new SecurityScheme()
+                .type(SecurityScheme.Type.APIKEY)
                 .in(SecurityScheme.In.HEADER)
-                .name("Authorization");
+                .name("Authorization")
+                .description("인증을 위한 토큰");
 
         // Security Requirement 정의
-        SecurityRequirement securityRequirement = new SecurityRequirement().addList("BearerAuth");
+        SecurityRequirement securityRequirement = new SecurityRequirement().addList("ApiKeyAuth");
 
-        // 서버 목록 정의
+        // 서버 정의
         Server localServer = new Server();
         localServer.setUrl("http://localhost:8080");
-        localServer.setDescription("Local server (HTTP)");
+        localServer.setDescription("Local Server");
 
-        Server prodServer = new Server();
-        prodServer.setUrl("https://smartair.site");
-        prodServer.setDescription("Production server (HTTPS)");
+        Server apiServer = new Server();
+        apiServer.setUrl("http://3.36.34.67:8080");
+        apiServer.setDescription("API Server");
 
         return new OpenAPI()
                 .info(new Info().title("Enjoy Hack API")
                         .description("EnjoyHack Application API Documentation")
                         .version("v1.0"))
-                .addSecurityItem(securityRequirement)  // Security Requirement 추가
-                .schemaRequirement("BearerAuth", securityScheme) // Security Scheme 추가
-                .servers(List.of(localServer, prodServer));  // 서버 목록 추가
+                .addSecurityItem(securityRequirement)
+                .schemaRequirement("ApiKeyAuth", apiKeyScheme)
+                .servers(List.of(localServer, apiServer));    // 로컬서버와 운영서버 모두 등록
     }
-
-}
+}
\ No newline at end of file
diff --git a/src/main/java/com/example/smartair/config/WebClientConfig.java b/src/main/java/com/example/enjoy/config/WebClientConfig.java
similarity index 90%
rename from src/main/java/com/example/smartair/config/WebClientConfig.java
rename to src/main/java/com/example/enjoy/config/WebClientConfig.java
index 3c5b8730..ac41db6f 100644
--- a/src/main/java/com/example/smartair/config/WebClientConfig.java
+++ b/src/main/java/com/example/enjoy/config/WebClientConfig.java
@@ -1,4 +1,4 @@
-package com.example.smartair.config;
+package com.example.enjoy.config;
 
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
diff --git a/src/main/java/com/example/smartair/config/corsMvcConfig.java b/src/main/java/com/example/enjoy/config/corsMvcConfig.java
similarity index 93%
rename from src/main/java/com/example/smartair/config/corsMvcConfig.java
rename to src/main/java/com/example/enjoy/config/corsMvcConfig.java
index 45d994bd..b72f884f 100644
--- a/src/main/java/com/example/smartair/config/corsMvcConfig.java
+++ b/src/main/java/com/example/enjoy/config/corsMvcConfig.java
@@ -1,4 +1,4 @@
-package com.example.smartair.config;
+package com.example.enjoy.config;
 
 import org.springframework.context.annotation.Configuration;
 import org.springframework.web.servlet.config.annotation.CorsRegistry;
diff --git a/src/main/java/com/example/smartair/controller/HealthCheckController.java b/src/main/java/com/example/enjoy/controller/HealthCheckController.java
similarity index 89%
rename from src/main/java/com/example/smartair/controller/HealthCheckController.java
rename to src/main/java/com/example/enjoy/controller/HealthCheckController.java
index 5aed254e..9df97447 100644
--- a/src/main/java/com/example/smartair/controller/HealthCheckController.java
+++ b/src/main/java/com/example/enjoy/controller/HealthCheckController.java
@@ -1,4 +1,4 @@
-package com.example.smartair.controller;
+package com.example.enjoy.controller;
 
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
diff --git a/src/main/java/com/example/enjoy/controller/userController/LoginController.java b/src/main/java/com/example/enjoy/controller/userController/LoginController.java
new file mode 100644
index 00000000..0cfdcdb3
--- /dev/null
+++ b/src/main/java/com/example/enjoy/controller/userController/LoginController.java
@@ -0,0 +1,41 @@
+package com.example.enjoy.controller.userController;
+
+import com.example.enjoy.dto.loginDto.MemberCommand;
+import com.example.enjoy.dto.loginDto.MemberDto;
+import com.example.enjoy.service.loginService.SejongLoginService;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.validation.Valid;
+import lombok.AllArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@Tag(name = "로그인", description = "로그인 관련 API")
+@RestController
+@Slf4j
+@AllArgsConstructor
+@RequestMapping("/api/auth/sejong")
+public class LoginController {
+    private final SejongLoginService sejongLoginService;
+
+    /**
+     * 세종대학교 포털 로그인 및 사용자 정보 조회
+     * 포털 로그인 -> 고전독서 사이트 SSO 인증 -> 사용자 정보 파싱 및 반환
+     */
+    @PostMapping("/login")
+    public ResponseEntity<MemberDto> loginAndGetUserInfo(@RequestBody @Valid MemberCommand command) {
+        try {
+            log.info("세종대 포털 로그인 요청: {}", command.getSejongPortalId());
+            MemberDto memberInfo = sejongLoginService.getMemberAuthInfos(command);
+            log.info("사용자 정보 조회 성공: {}", memberInfo.getStudentName());
+            return ResponseEntity.ok(memberInfo);
+        } catch (Exception e) {
+            log.error("세종대 포털 로그인 및 정보 조회 실패: {}", e.getMessage(), e);
+            throw new RuntimeException("세종대 포털 인증 실패", e);
+        }
+    }
+
+}
diff --git a/src/main/java/com/example/enjoy/dto/loginDto/AuthRequest.java b/src/main/java/com/example/enjoy/dto/loginDto/AuthRequest.java
new file mode 100644
index 00000000..3f37034a
--- /dev/null
+++ b/src/main/java/com/example/enjoy/dto/loginDto/AuthRequest.java
@@ -0,0 +1,17 @@
+package com.example.enjoy.dto.loginDto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class AuthRequest {
+    private String id;
+    private String pw;
+    private String method;
+}
+
diff --git a/src/main/java/com/example/enjoy/dto/loginDto/AuthResponseDto.java b/src/main/java/com/example/enjoy/dto/loginDto/AuthResponseDto.java
new file mode 100644
index 00000000..06eff4e4
--- /dev/null
+++ b/src/main/java/com/example/enjoy/dto/loginDto/AuthResponseDto.java
@@ -0,0 +1,24 @@
+package com.example.enjoy.dto.loginDto;
+
+public class AuthResponseDto {
+    private String msg;
+    private Result result;
+    private String code;
+    private Boolean is_auth;
+    private Integer status_code;
+    private Boolean success;
+    private String version;
+
+    public static class Result {
+        private String authenticator;
+        private Body body;
+        // getters/setters
+    }
+
+    public static class Body {
+        private String major;
+        private String name;
+        // getters/setters
+    }
+    // getters/setters
+}
diff --git a/src/main/java/com/example/enjoy/dto/loginDto/MemberCommand.java b/src/main/java/com/example/enjoy/dto/loginDto/MemberCommand.java
new file mode 100644
index 00000000..d83476c6
--- /dev/null
+++ b/src/main/java/com/example/enjoy/dto/loginDto/MemberCommand.java
@@ -0,0 +1,12 @@
+package com.example.enjoy.dto.loginDto;
+
+import lombok.Getter;
+import org.springframework.stereotype.Service;
+
+@Getter
+@Service
+public class MemberCommand {
+    String sejongPortalId;
+    String sejongPortalPassword;
+
+}
diff --git a/src/main/java/com/example/enjoy/dto/loginDto/MemberDto.java b/src/main/java/com/example/enjoy/dto/loginDto/MemberDto.java
new file mode 100644
index 00000000..03a23a60
--- /dev/null
+++ b/src/main/java/com/example/enjoy/dto/loginDto/MemberDto.java
@@ -0,0 +1,15 @@
+package com.example.enjoy.dto.loginDto;
+
+import lombok.Builder;
+import lombok.Getter;
+
+@Builder
+@Getter
+public class MemberDto {
+    private String major;
+    private String studentIdString;
+    private String studentName;
+    private String academicYear;
+    private String enrollmentStatus;
+
+}
diff --git a/src/main/java/com/example/smartair/entity/BaseTimeEntity.java b/src/main/java/com/example/enjoy/entity/BaseTimeEntity.java
similarity index 91%
rename from src/main/java/com/example/smartair/entity/BaseTimeEntity.java
rename to src/main/java/com/example/enjoy/entity/BaseTimeEntity.java
index a65cd943..9f629dfb 100644
--- a/src/main/java/com/example/smartair/entity/BaseTimeEntity.java
+++ b/src/main/java/com/example/enjoy/entity/BaseTimeEntity.java
@@ -1,6 +1,5 @@
-package com.example.smartair.entity;
+package com.example.enjoy.entity;
 
-import jakarta.persistence.Entity;
 import jakarta.persistence.EntityListeners;
 import jakarta.persistence.MappedSuperclass;
 import lombok.Getter;
diff --git a/src/main/java/com/example/smartair/entity/user/User.java b/src/main/java/com/example/enjoy/entity/user/User.java
similarity index 80%
rename from src/main/java/com/example/smartair/entity/user/User.java
rename to src/main/java/com/example/enjoy/entity/user/User.java
index 3202adb0..0ea12e95 100644
--- a/src/main/java/com/example/smartair/entity/user/User.java
+++ b/src/main/java/com/example/enjoy/entity/user/User.java
@@ -1,12 +1,10 @@
-package com.example.smartair.entity.user;
+package com.example.enjoy.entity.user;
 
-import com.example.smartair.entity.BaseTimeEntity;
+import com.example.enjoy.entity.BaseTimeEntity;
 
 import jakarta.persistence.*;
 import lombok.*;
 
-import java.util.Set;
-
 @Builder
 @Entity
 @Getter
@@ -30,8 +28,6 @@ public class User extends BaseTimeEntity {
 
     private String providerId; //소셜 로그인 시 제공자 ID
 
-    private Role role;
-
 
 
 }
diff --git a/src/main/java/com/example/smartair/exception/CustomException.java b/src/main/java/com/example/enjoy/exception/CustomException.java
similarity index 90%
rename from src/main/java/com/example/smartair/exception/CustomException.java
rename to src/main/java/com/example/enjoy/exception/CustomException.java
index b61b839a..72682d89 100644
--- a/src/main/java/com/example/smartair/exception/CustomException.java
+++ b/src/main/java/com/example/enjoy/exception/CustomException.java
@@ -1,4 +1,4 @@
-package com.example.smartair.exception;
+package com.example.enjoy.exception;
 
 import lombok.Getter;
 
diff --git a/src/main/java/com/example/smartair/exception/ErrorCode.java b/src/main/java/com/example/enjoy/exception/ErrorCode.java
similarity index 69%
rename from src/main/java/com/example/smartair/exception/ErrorCode.java
rename to src/main/java/com/example/enjoy/exception/ErrorCode.java
index 078b25f1..4f38c873 100644
--- a/src/main/java/com/example/smartair/exception/ErrorCode.java
+++ b/src/main/java/com/example/enjoy/exception/ErrorCode.java
@@ -1,4 +1,4 @@
-package com.example.smartair.exception;
+package com.example.enjoy.exception;
 
 import lombok.AllArgsConstructor;
 import lombok.Getter;
@@ -12,7 +12,10 @@ public enum ErrorCode {
     USER_JOIN_INFO_BAD_REQUEST(HttpStatus.BAD_REQUEST, "회원가입 정보가 잘못되었습니다"),
     USER_ALREADY_EXISTS(HttpStatus.BAD_REQUEST, "이미 존재하는 사용자입니다"),
     USER_NOT_FOUND(HttpStatus.NOT_FOUND, "사용자를 찾을 수 없습니다"),
-    USER_PASSWORD_NOT_MATCH(HttpStatus.BAD_REQUEST, "비밀번호가 일치하지 않습니다");
+    USER_PASSWORD_NOT_MATCH(HttpStatus.BAD_REQUEST, "비밀번호가 일치하지 않습니다"),
+    SEJONG_AUTH_CONNECTION_ERROR(HttpStatus.INTERNAL_SERVER_ERROR, "세종대학교 인증 서버와의 연결에 실패했습니다"),
+    SEJONG_AUTH_CREDENTIALS_INVALID(HttpStatus.UNAUTHORIZED, "세종대학교 인증 정보가 유효하지 않습니다"),
+    SEJONG_AUTH_DATA_FETCH_ERROR(HttpStatus.INTERNAL_SERVER_ERROR, "세종대학교 인증 데이터 가져오기 실패");
 
     private final String message;
     private final int status;
diff --git a/src/main/java/com/example/smartair/exception/GlobalExceptionHandler.java b/src/main/java/com/example/enjoy/exception/GlobalExceptionHandler.java
similarity index 96%
rename from src/main/java/com/example/smartair/exception/GlobalExceptionHandler.java
rename to src/main/java/com/example/enjoy/exception/GlobalExceptionHandler.java
index 61e9fd5f..c1569468 100644
--- a/src/main/java/com/example/smartair/exception/GlobalExceptionHandler.java
+++ b/src/main/java/com/example/enjoy/exception/GlobalExceptionHandler.java
@@ -1,4 +1,4 @@
-package com.example.smartair.exception;
+package com.example.enjoy.exception;
 
 import lombok.extern.slf4j.Slf4j;
 
@@ -7,7 +7,6 @@
 import org.springframework.web.bind.annotation.RestControllerAdvice;
 import org.springframework.web.server.ResponseStatusException;
 
-import java.util.Collections;
 import java.util.HashMap;
 
 @RestControllerAdvice
diff --git a/src/main/java/com/example/enjoy/service/loginService/SejongLoginService.java b/src/main/java/com/example/enjoy/service/loginService/SejongLoginService.java
new file mode 100644
index 00000000..a8fae12c
--- /dev/null
+++ b/src/main/java/com/example/enjoy/service/loginService/SejongLoginService.java
@@ -0,0 +1,279 @@
+package com.example.enjoy.service.loginService;
+
+
+import com.example.enjoy.dto.loginDto.MemberCommand;
+import com.example.enjoy.dto.loginDto.MemberDto;
+import com.example.enjoy.exception.CustomException;
+import com.example.enjoy.exception.ErrorCode;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import okhttp3.*;
+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Document;
+import org.springframework.stereotype.Service;
+import okhttp3.JavaNetCookieJar;
+import javax.net.ssl.*;
+import java.io.IOException;
+import java.net.CookieManager;
+import java.net.CookiePolicy;
+import java.net.SocketTimeoutException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+
+@Slf4j
+@Service
+@RequiredArgsConstructor
+public class SejongLoginService {
+
+    /**
+     * 세종포털 인증을 통해 사용자 정보를 가져옵니다
+     */
+    public MemberDto getMemberAuthInfos(MemberCommand command) {
+        String sejongPortalId = command.getSejongPortalId();
+        String sejongPortalPw = command.getSejongPortalPassword();
+
+        try {
+            // OkHttpClient 생성
+            OkHttpClient client = buildClient();
+
+            // 포털 로그인 요청
+            doPortalLogin(client, sejongPortalId, sejongPortalPw);
+
+            // 포털 -> 고전독서 SSO 시작점 접근
+            String portalClassicLinkUrl = "https://portal.sejong.ac.kr/html/classic/classic.html";
+            Request portalReq = new Request.Builder()
+                    .url(portalClassicLinkUrl)
+                    .get()
+                    .build();
+            try (Response portalResp = executeWithRetry(client, portalReq)) {
+                log.debug("포털 링크 응답: {}", portalResp.code());
+            }
+
+            // SSO 리다이렉트 처리
+            String ssoUrl = "https://classic.sejong.ac.kr/_custom/sejong/sso/sso-return.jsp?returnUrl=https://classic.sejong.ac.kr/classic/index.do";
+            Request ssoReq = new Request.Builder()
+                    .url(ssoUrl)
+                    .get()
+                    .header("Referer", "https://portal.sejong.ac.kr/")
+                    .header("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36")
+                    .build();
+
+            try (Response ssoResp = executeWithRetry(client, ssoReq)) {
+                log.debug("SSO 응답: {} - 쿠키 수: {}",
+                        ssoResp.code(),
+                        client.cookieJar().loadForRequest(HttpUrl.get(ssoUrl)).size());
+
+                if (!ssoResp.isSuccessful()) {
+                    throw new CustomException(ErrorCode.SEJONG_AUTH_CONNECTION_ERROR, "SSO 리다이렉트 실패");
+                }
+            }
+
+            // 메인 페이지 방문 (중요: 세션 쿠키 설정을 위해)
+            String mainUrl = "https://classic.sejong.ac.kr/classic/index.do";
+            Request mainReq = new Request.Builder()
+                    .url(mainUrl)
+                    .get()
+                    .header("Referer", ssoUrl)
+                    .build();
+
+            try (Response mainResp = executeWithRetry(client, mainReq)) {
+                log.debug("메인 페이지 응답: {}", mainResp.code());
+                if (!mainResp.isSuccessful()) {
+                    throw new CustomException(ErrorCode.SEJONG_AUTH_CONNECTION_ERROR, "메인 페이지 접근 실패");
+                }
+            }
+
+            // 고전독서인증현황 페이지 GET
+            String html = fetchReadingStatusHtml(client);
+
+            // HTML 파싱 및 정보 추출
+            return parseHTMLAndGetMemberInfo(html);
+
+        } catch (IOException e) {
+            log.error("포털 인증 중 오류 발생: {}", e.getMessage(), e);
+            throw new CustomException(ErrorCode.SEJONG_AUTH_CONNECTION_ERROR, "포털 인증 중 오류 발생");
+        }
+    }
+
+
+    /**
+     * 세종포털에 ID/PW로 로그인
+     */
+    private void doPortalLogin(OkHttpClient client, String studentId, String password) throws IOException {
+        String loginUrl = "https://portal.sejong.ac.kr/jsp/login/login_action.jsp";
+
+        RequestBody formBody = new FormBody.Builder()
+                .add("mainLogin", "N")
+                .add("rtUrl", "")  // 빈 값으로 변경하여 리디렉션 동작 확인
+                .add("id", studentId)
+                .add("password", password)
+                .build();
+
+        Request request = new Request.Builder()
+                .url(loginUrl)
+                .post(formBody)
+                .header("Host", "portal.sejong.ac.kr")
+                .header("Origin", "https://portal.sejong.ac.kr")
+                .header("Referer", "https://portal.sejong.ac.kr/jsp/login/login.jsp")
+                .header("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36")
+                .build();
+
+        try (Response response = executeWithRetry(client, request)) {
+            log.debug("포털 로그인 응답: {}", response.code());
+            String responseBody = response.body() != null ? response.body().string() : "";
+
+            if (responseBody.contains("alert") && responseBody.contains("로그인")) {
+                throw new CustomException(ErrorCode.SEJONG_AUTH_CREDENTIALS_INVALID, "포털 로그인 실패");
+            }
+        }
+    }
+
+    /**
+     * 고전독서인증현황 페이지 HTML 가져오기
+     */
+    private String fetchReadingStatusHtml(OkHttpClient client) throws IOException {
+        String statusUrl = "https://classic.sejong.ac.kr/classic/reading/status.do";
+
+        // 요청 전 쿠키 상태 확인
+        logCookies(client, statusUrl);
+
+        Request request = new Request.Builder()
+                .url(statusUrl)
+                .get()
+                .header("Referer", "https://classic.sejong.ac.kr/classic/index.do")
+                .build();
+
+        try (Response response = client.newCall(request).execute()) {
+            log.debug("고전독서인증현황 응답: {}", response.code());
+
+            if (response.code() != 200 || response.body() == null) {
+                throw new CustomException(ErrorCode.SEJONG_AUTH_DATA_FETCH_ERROR,
+                        "고전독서인증현황 페이지 조회 실패: " + response);
+            }
+
+            return response.body().string();
+        }
+    }
+
+    /**
+     * 디버깅용: 쿠키 정보 출력
+     */
+    private void logCookies(OkHttpClient client, String url) {
+        List<Cookie> cookies = client.cookieJar().loadForRequest(HttpUrl.get(url));
+        log.debug("URL {} 쿠키 정보 ({}):", url, cookies.size());
+        for (Cookie cookie : cookies) {
+            log.debug(" - {}: {}", cookie.name(), cookie.value());
+        }
+    }
+
+    /**
+     * 고전독서인증현황 페이지 파싱
+     */
+    private MemberDto parseHTMLAndGetMemberInfo(String html) {
+        Document doc = Jsoup.parse(html);
+
+        String selector = ".b-con-box:has(h4.b-h4-tit01:contains(사용자 정보)) table.b-board-table tbody tr";
+        List<String> rowValues = new ArrayList<>();
+
+        doc.select(selector).forEach(tr -> {
+            String value = tr.select("td").text().trim();
+            rowValues.add(value);
+        });
+
+        String major = getValueFromList(rowValues, 0);
+        String studentId = getValueFromList(rowValues, 1);
+        String studentName = getValueFromList(rowValues, 2);
+        String year = getValueFromList(rowValues, 3);
+        String status = getValueFromList(rowValues, 4);
+
+        return MemberDto.builder()
+                .major(major)
+                .studentIdString(studentId)
+                .studentName(studentName)
+                .academicYear(year)
+                .enrollmentStatus(status)
+                .build();
+    }
+
+    /**
+     * List에서 안전하게 값 가져오기
+     */
+    private String getValueFromList(List<String> list, int index) {
+        return list.size() > index ? list.get(index) : null;
+    }
+
+    /**
+     * 재시도 로직이 포함된 요청 실행
+     */
+    private Response executeWithRetry(OkHttpClient client, Request request) throws IOException {
+        int tryCount = 0;
+        int maxRetries = 3;
+
+        while (tryCount < maxRetries) {
+            try {
+                Response response = client.newCall(request).execute();
+                if (response.isSuccessful() || tryCount == maxRetries - 1) {
+                    return response;
+                }
+                response.close();
+            } catch (SocketTimeoutException e) {
+                if (tryCount == maxRetries - 1) {
+                    throw e;
+                }
+            }
+            tryCount++;
+            log.debug("요청 재시도 ({}/{}): {}", tryCount, maxRetries, request.url());
+        }
+        throw new IOException("최대 재시도 횟수 초과: " + request.url());
+    }
+
+    private OkHttpClient buildClient() {
+        try {
+            // SSLContext 생성, 모든 인증서 신뢰 설정
+            SSLContext sslCtx = SSLContext.getInstance("SSL");
+            sslCtx.init(null, new TrustManager[]{trustAllManager()}, new java.security.SecureRandom());
+            SSLSocketFactory sslFactory = sslCtx.getSocketFactory();
+
+            // hostnameVerifier: 모든 호스트네임에 대해 OK 처리
+            HostnameVerifier hostnameVerifier = (hostname, session) -> true;
+
+            // OkHttp 로깅 인터셉터
+//      HttpLoggingInterceptor logging = new HttpLoggingInterceptor(log::info);
+//      logging.setLevel(HttpLoggingInterceptor.Level.BODY);
+
+            // 쿠키 관리
+            CookieManager cookieManager = new CookieManager();
+            cookieManager.setCookiePolicy(CookiePolicy.ACCEPT_ALL);
+
+            // OkHttpClient 생성
+            return new OkHttpClient.Builder()
+                    .sslSocketFactory(sslFactory, trustAllManager())
+                    .hostnameVerifier(hostnameVerifier)
+                    .cookieJar(new JavaNetCookieJar(cookieManager))
+//          .addInterceptor(logging)
+                    .build();
+
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    /**
+     * 모든 서버 인증서를 신뢰하는 X509TrustManager 구현
+     */
+    private X509TrustManager trustAllManager() {
+        return new X509TrustManager() {
+            @Override
+            public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) {}
+            @Override
+            public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) {}
+            @Override
+            public java.security.cert.X509Certificate[] getAcceptedIssuers() {
+                return new java.security.cert.X509Certificate[0];
+            }
+        };
+    }
+}
+
+
diff --git a/src/main/java/com/example/smartair/util/BaseEntity.java b/src/main/java/com/example/enjoy/util/BaseEntity.java
similarity index 87%
rename from src/main/java/com/example/smartair/util/BaseEntity.java
rename to src/main/java/com/example/enjoy/util/BaseEntity.java
index 6203e346..93048641 100644
--- a/src/main/java/com/example/smartair/util/BaseEntity.java
+++ b/src/main/java/com/example/enjoy/util/BaseEntity.java
@@ -1,11 +1,10 @@
-package com.example.smartair.util;
+package com.example.enjoy.util;
 
 import jakarta.persistence.Column;
 import jakarta.persistence.EntityListeners;
 import jakarta.persistence.MappedSuperclass;
 import lombok.Getter;
 import org.springframework.data.annotation.CreatedDate;
-import org.springframework.data.annotation.LastModifiedBy;
 import org.springframework.data.annotation.LastModifiedDate;
 import org.springframework.data.jpa.domain.support.AuditingEntityListener;
 
diff --git a/src/main/java/com/example/smartair/controller/userController/LoginController.java b/src/main/java/com/example/smartair/controller/userController/LoginController.java
deleted file mode 100644
index 70f1181c..00000000
--- a/src/main/java/com/example/smartair/controller/userController/LoginController.java
+++ /dev/null
@@ -1,40 +0,0 @@
-package com.example.smartair.controller.userController;
-
-import io.swagger.v3.oas.annotations.tags.Tag;
-import lombok.AllArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.springframework.web.bind.annotation.RestController;
-
-@Tag(name = "로그인", description = "로그인 관련 API")
-@RestController
-@Slf4j
-@AllArgsConstructor
-public class LoginController {
-
-
-
-
-
-//    @Operation(
-//            summary = "로그인",
-//            description = "이메일과 비밀번호로 로그인하여 액세스 토큰과 리프레시 토큰을 받습니다.",
-//            responses = {
-//                    @ApiResponse(
-//                            responseCode = "200",
-//                            description = "로그인 성공",
-//                            content = @Content(
-//                                    schema = @Schema(implementation = TokenDto.class)
-//                            )
-//                    )
-//            }
-//    )
-//    @PostMapping("/login")
-//    public ResponseEntity<TokenDto> login(@RequestBody LoginDTO loginRequestDto) {
-//        TokenDto tokenDto = loginService.login(loginRequestDto);
-//        // 응답 본문에 TokenDto를 직접 반환
-//        return ResponseEntity.ok()
-//                .contentType(MediaType.APPLICATION_JSON)
-//                .body(tokenDto);
-//    }
-
-}
diff --git a/src/main/java/com/example/smartair/entity/login/CustomUserDetails.java b/src/main/java/com/example/smartair/entity/login/CustomUserDetails.java
deleted file mode 100644
index cff40303..00000000
--- a/src/main/java/com/example/smartair/entity/login/CustomUserDetails.java
+++ /dev/null
@@ -1,71 +0,0 @@
-package com.example.smartair.entity.login;
-
-import com.example.smartair.entity.user.User;
-import org.springframework.security.core.GrantedAuthority;
-import org.springframework.security.core.userdetails.UserDetails;
-
-import java.util.ArrayList;
-import java.util.Collection;
-
-public class CustomUserDetails implements UserDetails { // 시큐리티에서 사용자 정보를 담는 인터페이스
-    private final User user;
-    public CustomUserDetails(User user) {
-        this.user = user;
-    }
-
-    @Override
-    public Collection<? extends GrantedAuthority> getAuthorities() {
-
-        Collection<GrantedAuthority> authorities = new ArrayList<>();
-
-        authorities.add(new GrantedAuthority() {
-            @Override
-            public String getAuthority() {
-                return String.valueOf(user.getRole());
-            }
-        });
-        return authorities;
-    }
-
-    public User getUser(){
-        return user;
-    }
-    @Override
-    public String getPassword() {
-
-        return user.getPassword();
-    }
-    @Override
-    public String getUsername() {
-
-        return user.getUsername();
-    }
-    public String getEmail() {
-
-        return user.getEmail();
-    }
-
-    @Override
-    public boolean isAccountNonExpired() {
-
-        return true;
-    }
-
-    @Override
-    public boolean isAccountNonLocked() {
-
-        return true;
-    }
-
-    @Override
-    public boolean isCredentialsNonExpired() {
-
-        return true;
-    }
-
-    @Override
-    public boolean isEnabled() {
-
-        return true;
-    }
-}
diff --git a/src/main/java/com/example/smartair/entity/login/RefreshEntity.java b/src/main/java/com/example/smartair/entity/login/RefreshEntity.java
deleted file mode 100644
index 968fd0d7..00000000
--- a/src/main/java/com/example/smartair/entity/login/RefreshEntity.java
+++ /dev/null
@@ -1,22 +0,0 @@
-package com.example.smartair.entity.login;
-
-import jakarta.persistence.Entity;
-import jakarta.persistence.GeneratedValue;
-import jakarta.persistence.GenerationType;
-import jakarta.persistence.Id;
-import lombok.Getter;
-import lombok.Setter;
-
-@Entity
-@Getter
-@Setter
-public class RefreshEntity {
-
-    @Id
-    @GeneratedValue(strategy = GenerationType.IDENTITY)
-    private Long id;
-
-    private String username;
-    private String refresh;
-    private String expiration;
-}
\ No newline at end of file
diff --git a/src/main/java/com/example/smartair/entity/user/Role.java b/src/main/java/com/example/smartair/entity/user/Role.java
deleted file mode 100644
index aadb9dd3..00000000
--- a/src/main/java/com/example/smartair/entity/user/Role.java
+++ /dev/null
@@ -1,15 +0,0 @@
-package com.example.smartair.entity.user;
-
-import lombok.Getter;
-
-@Getter
-public enum Role {
-    ADMIN("ROLE_ADMIN"),
-    MANAGER("ROLE_MANAGER"),
-    USER("ROLE_USER");
-
-    Role(String value){
-        this.value = value;
-    }
-    private String value;
-}
diff --git a/src/test/java/com/example/smartair/EnjoyBackApplicationTests.java b/src/test/java/com/example/enjoy/EnjoyBackApplicationTests.java
similarity index 86%
rename from src/test/java/com/example/smartair/EnjoyBackApplicationTests.java
rename to src/test/java/com/example/enjoy/EnjoyBackApplicationTests.java
index 272e880b..7ff8d2f4 100644
--- a/src/test/java/com/example/smartair/EnjoyBackApplicationTests.java
+++ b/src/test/java/com/example/enjoy/EnjoyBackApplicationTests.java
@@ -1,4 +1,4 @@
-package com.example.smartair;
+package com.example.enjoy;
 
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;