diff --git a/src/main/java/com/diareat/diareat/auth/controller/AuthController.java b/src/main/java/com/diareat/diareat/auth/controller/AuthController.java
index 1d01ad3..385b7d2 100644
--- a/src/main/java/com/diareat/diareat/auth/controller/AuthController.java
+++ b/src/main/java/com/diareat/diareat/auth/controller/AuthController.java
@@ -2,7 +2,7 @@
 
 import com.diareat.diareat.auth.component.JwtTokenProvider;
 import com.diareat.diareat.auth.service.KakaoAuthService;
-import com.diareat.diareat.user.dto.CreateUserDto;
+import com.diareat.diareat.user.dto.JoinUserDto;
 import com.diareat.diareat.user.service.UserService;
 import com.diareat.diareat.util.api.ApiResponse;
 import com.diareat.diareat.util.api.ResponseCode;
@@ -36,8 +36,8 @@ public ApiResponse<HashMap<Long, String>> authCheck(@RequestHeader String access
     // 회원가입 (성공 시 Jwt 토큰 발급)
     @Operation(summary = "[회원가입] 회원가입 및 토큰 발급", description = "신규 회원가입을 처리하고, 회원가입 성공 시 Jwt 토큰을 발급합니다.")
     @PostMapping("/join")
-    public ApiResponse<HashMap<Long, String>> saveUser(CreateUserDto createUserDto) {
-        Long userId = userService.saveUser(createUserDto);
+    public ApiResponse<HashMap<Long, String>> saveUser(JoinUserDto joinUserDto) {
+        Long userId = userService.saveUser(kakaoAuthService.createUserDto(joinUserDto));
         HashMap<Long, String> map = new HashMap<>();
         map.put(userId, jwtTokenProvider.createToken(userId.toString()));
         return ApiResponse.success(map, ResponseCode.USER_CREATE_SUCCESS.getMessage());
diff --git a/src/main/java/com/diareat/diareat/auth/service/KakaoAuthService.java b/src/main/java/com/diareat/diareat/auth/service/KakaoAuthService.java
index ffabdb4..0d22bc4 100644
--- a/src/main/java/com/diareat/diareat/auth/service/KakaoAuthService.java
+++ b/src/main/java/com/diareat/diareat/auth/service/KakaoAuthService.java
@@ -3,6 +3,8 @@
 import com.diareat.diareat.auth.component.KakaoUserInfo;
 import com.diareat.diareat.auth.dto.KakaoUserInfoResponse;
 import com.diareat.diareat.user.domain.User;
+import com.diareat.diareat.user.dto.CreateUserDto;
+import com.diareat.diareat.user.dto.JoinUserDto;
 import com.diareat.diareat.user.repository.UserRepository;
 import com.diareat.diareat.util.api.ResponseCode;
 import com.diareat.diareat.util.exception.UserException;
@@ -12,7 +14,7 @@
 
 @RequiredArgsConstructor
 @Service
-public class KakaoAuthService { // 카카오 소셜로그인, 세션 관리는 추후 구현 예정
+public class KakaoAuthService {
 
     private final KakaoUserInfo kakaoUserInfo;
     private final UserRepository userRepository;
@@ -23,4 +25,11 @@ public Long isSignedUp(String token) { // 클라이언트가 보낸 token을 이
         User user = userRepository.findByKeyCode(userInfo.getId().toString()).orElseThrow(() -> new UserException(ResponseCode.USER_NOT_FOUND));
         return user.getId();
     }
+
+    @Transactional(readOnly = true)
+    public CreateUserDto createUserDto(JoinUserDto joinUserDto) { // 카카오로부터 프사 URL, 유저 고유ID를 얻어온 후, 이를 유저가 입력한 정보와 함께 CreateUserDto로 반환
+        KakaoUserInfoResponse userInfo = kakaoUserInfo.getUserInfo(joinUserDto.getToken());
+        return CreateUserDto.of(joinUserDto.getNickName(), userInfo.getKakaoAccount().getProfile().getProfileImageUrl(),
+                userInfo.getId().toString(), joinUserDto.getGender(), joinUserDto.getHeight(), joinUserDto.getWeight(), joinUserDto.getAge());
+    }
 }