diff --git a/README.md b/README.md
index 4e8c017..c79c734 100644
--- a/README.md
+++ b/README.md
@@ -49,6 +49,7 @@ src/main/java/com/bio/bio_backend/
 
 ```java
 public class ApiResponseDto<T> {
+    private boolean success;    // 성공/실패 여부 (true/false)
     private int code;           // HTTP 상태 코드
     private String message;     // 응답 메시지 (ApiResponseCode enum 값)
     private String description; // 응답 설명
@@ -56,12 +57,23 @@ public class ApiResponseDto<T> {
 }
 ```
 
+#### 상수 정의
+
+```java
+public class ApiResponseDto<T> {
+    private static final boolean SUCCESS = true;
+    private static final boolean FAIL = false;
+    // ... 필드들
+}
+```
+
 #### 응답 예시
 
 **성공 응답 (201 Created)**
 
 ```json
 {
+  "success": true,
   "code": 201,
   "message": "COMMON_SUCCESS_CREATED",
   "description": "Created successfully",
@@ -77,6 +89,7 @@ public class ApiResponseDto<T> {
 
 ```json
 {
+  "success": false,
   "code": 409,
   "message": "USER_ID_DUPLICATE",
   "description": "User ID already exists"
@@ -131,7 +144,8 @@ public enum ApiResponseCode {
 
 - **모든 API 응답**: `ApiResponseDto<T>`로 감싸서 반환
 - **공용 응답 코드**: `COMMON_` 접두사로 시작하는 범용 코드 사용
-- **일관된 구조**: `code`, `message`, `description`, `data` 필드로 표준화
+- **일관된 구조**: `success`, `code`, `message`, `description`, `data` 필드로 표준화
+- **성공/실패 구분**: `success` 필드로 명확한 성공/실패 여부 전달
 - **제네릭 활용**: `<T>`를 통해 다양한 데이터 타입 지원
 
 ### 3. JWT 인증 시스템
diff --git a/src/main/java/com/bio/bio_backend/domain/admin/common_code/service/CommonCodeServiceImpl.java b/src/main/java/com/bio/bio_backend/domain/admin/common_code/service/CommonCodeServiceImpl.java
index 832504c..199b43c 100644
--- a/src/main/java/com/bio/bio_backend/domain/admin/common_code/service/CommonCodeServiceImpl.java
+++ b/src/main/java/com/bio/bio_backend/domain/admin/common_code/service/CommonCodeServiceImpl.java
@@ -8,6 +8,7 @@ import com.bio.bio_backend.domain.admin.common_code.mapper.CommonCodeMapper;
 import com.bio.bio_backend.domain.admin.common_code.mapper.CommonGroupCodeMapper;
 import com.bio.bio_backend.domain.admin.common_code.repository.CommonCodeRepository;
 import com.bio.bio_backend.domain.admin.common_code.repository.CommonGroupCodeRepository;
+import com.bio.bio_backend.global.constants.AppConstants;
 import com.bio.bio_backend.global.exception.ApiException;
 import com.bio.bio_backend.global.constants.ApiResponseCode;
 import lombok.RequiredArgsConstructor;
@@ -33,7 +34,7 @@ public class CommonCodeServiceImpl implements CommonCodeService {
     @Transactional
     public CommonGroupCodeDto createGroupCode(CommonGroupCodeDto groupCodeDto) {
         if (commonGroupCodeRepository.existsByCode(groupCodeDto.getCode())) {
-            throw new ApiException(ApiResponseCode.USER_ID_DUPLICATE, "이미 존재하는 그룹 코드입니다: " + groupCodeDto.getCode());
+            throw new ApiException(ApiResponseCode.COMMON_CODE_DUPLICATE);
         }
         
         CommonGroupCode groupCode = commonGroupCodeMapper.toCommonGroupCode(groupCodeDto);
diff --git a/src/main/java/com/bio/bio_backend/global/constants/ApiResponseCode.java b/src/main/java/com/bio/bio_backend/global/constants/ApiResponseCode.java
index 54f588d..fc5bb88 100644
--- a/src/main/java/com/bio/bio_backend/global/constants/ApiResponseCode.java
+++ b/src/main/java/com/bio/bio_backend/global/constants/ApiResponseCode.java
@@ -14,7 +14,7 @@ public enum ApiResponseCode {
     
     /*공통 Code*/
     // 200 OK
-    COMMON_SUCCESS(HttpStatus.OK.value(), "요청 성공"),
+    COMMON_SUCCESS(HttpStatus.OK.value(), "요청을 성공하였습니다"),
     COMMON_SUCCESS_CREATED(HttpStatus.CREATED.value(), "성공적으로 생성되었습니다"),
     COMMON_SUCCESS_UPDATED(HttpStatus.OK.value(), "성공적으로 수정되었습니다"),
     COMMON_SUCCESS_DELETED(HttpStatus.OK.value(), "성공적으로 삭제되었습니다"),
@@ -39,6 +39,7 @@ public enum ApiResponseCode {
 
     // 409 Conflict
     COMMON_CONFLICT(HttpStatus.CONFLICT.value(), "충돌이 발생했습니다"),
+    COMMON_CODE_DUPLICATE(HttpStatus.CONFLICT.value(), "동일한 코드가 존재합니다"),
 
     // 500 Internal Server Error
     COMMON_INTERNAL_SERVER_ERROR(HttpStatus.INTERNAL_SERVER_ERROR.value(), "서버에서 오류가 발생했습니다"),
diff --git a/src/main/java/com/bio/bio_backend/global/dto/ApiResponseDto.java b/src/main/java/com/bio/bio_backend/global/dto/ApiResponseDto.java
index 105f20c..8f1709f 100644
--- a/src/main/java/com/bio/bio_backend/global/dto/ApiResponseDto.java
+++ b/src/main/java/com/bio/bio_backend/global/dto/ApiResponseDto.java
@@ -12,12 +12,17 @@ import lombok.RequiredArgsConstructor;
 @JsonInclude(JsonInclude.Include.NON_NULL)
 public class ApiResponseDto<T> {
 
+    private static final boolean SUCCESS = true;
+    private static final boolean FAIL = false;
+
+    private boolean success;
     private int code;
     private String message;
     private String description;
     private T data;
 
-    private ApiResponseDto(int code, String message, String description, T data){
+    private ApiResponseDto(boolean success, int code, String message, String description, T data){
+        this.success = success;
         this.code = code;
         this.message = message;
         this.description = description;
@@ -25,19 +30,19 @@ public class ApiResponseDto<T> {
     }
 
     public static <T> ApiResponseDto<T> success(ApiResponseCode responseCode, T data) {
-        return new ApiResponseDto<T>(responseCode.getStatusCode(), responseCode.name(), responseCode.getDescription(), data);
+        return new ApiResponseDto<T>(SUCCESS, responseCode.getStatusCode(), responseCode.name(), responseCode.getDescription(), data);
     }
 
     public static <T> ApiResponseDto<T> success(ApiResponseCode responseCode) {
-        return new ApiResponseDto<T>(responseCode.getStatusCode(), responseCode.name(), responseCode.getDescription(), null);
+        return new ApiResponseDto<T>(SUCCESS, responseCode.getStatusCode(), responseCode.name(), responseCode.getDescription(), null);
     }
 
     public static <T> ApiResponseDto<T> fail(ApiResponseCode responseCode, T data) {
-        return new ApiResponseDto<T>(responseCode.getStatusCode(), responseCode.name(), responseCode.getDescription(), data);
+        return new ApiResponseDto<T>(FAIL, responseCode.getStatusCode(), responseCode.name(), responseCode.getDescription(), data);
     }
 
     public static <T> ApiResponseDto<T> fail(ApiResponseCode responseCode) {
-        return new ApiResponseDto<T>(responseCode.getStatusCode(), responseCode.name(), responseCode.getDescription(), null);
+        return new ApiResponseDto<T>(FAIL, responseCode.getStatusCode(), responseCode.name(), responseCode.getDescription(), null);
     }
 
 }