diff --git a/Program.cs b/Program.cs
index 7221288..5fa9a9c 100644
--- a/Program.cs
+++ b/Program.cs
@@ -191,22 +191,21 @@ else
 // 로컬 테스트 위한 부분 (올릴떄는 켜두기)
 app.UseHttpsRedirection();
 
+//예외처리 미들웨어 부분
+app.UseMiddleware<ExceptionMiddleware>();
 // 헤더 미들웨어 부분
-app.UseMiddleware<APIHeaderMiddleware>((object)new string[] { "iOS_AM_Connect_Key", "And_AM_Connect_Key", "Web_AM_Connect_Key" });
-// app.UseMiddleware<ExceptionMiddleware>();
-// app.UseMiddleware<CustomHeaderMiddleware>("X-MyHeader");
-
+app.UseMiddleware<APIHeaderMiddleware>(
+    (object)new string[] { "iOS_AM_Connect_Key", "And_AM_Connect_Key", "Web_AM_Connect_Key" }
+    );
 
 app.UseRouting();
-// app.MapControllers();
-
 app.UseCors("CorsPolicy");
 app.UseAuthorization();
 
 app.UseWebSockets();
 app.UseEndpoints(end =>
 {
-    end.MapControllers();
+    ControllerEndpointRouteBuilderExtensions.MapControllers(end);
     end.MapHub<ChatHub>("/chatHub");
 });
 
diff --git a/Program/Common/Middleware/ExceptionMiddleware.cs b/Program/Common/Middleware/ExceptionMiddleware.cs
index f373d31..e1b1d58 100644
--- a/Program/Common/Middleware/ExceptionMiddleware.cs
+++ b/Program/Common/Middleware/ExceptionMiddleware.cs
@@ -4,47 +4,46 @@ using Microsoft.Extensions.Logging;
 using System.Threading.Tasks;
 using Back.Program.Common.Model;
 
-namespace Back.Program.Common.Middleware
+namespace Back.Program.Common.Middleware;
+
+public class ExceptionMiddleware
 {
-    public class ExceptionMiddleware
+    private readonly RequestDelegate _next;
+    private readonly ILogger<ExceptionMiddleware> _logger;
+
+    public ExceptionMiddleware(RequestDelegate next, ILogger<ExceptionMiddleware> logger)
     {
-        private readonly RequestDelegate _next;
-        private readonly ILogger<ExceptionMiddleware> _logger;
+        _next = next;
+        _logger = logger;
+    }
 
-        public ExceptionMiddleware(RequestDelegate next, ILogger<ExceptionMiddleware> logger)
+    public async Task Invoke(HttpContext context)
+    {
+        try
         {
-            _next = next;
-            _logger = logger;
+            await _next(context); // 다음 미들웨어 호출
         }
+        catch (AcaException ex)
+        {
+            _logger.LogWarning(ex, $"예외 발생 : {ex.Message}");
+            // 400 : 이건 개발자가 직접 던지는 비즈니스 로직에 대한 예외 == 클라이언트의 오류
+            context.Response.StatusCode = ex.HttpStatus;
+            context.Response.ContentType = "application/json; charset=utf-8";
+            
+            var response = APIResponse.Send<string>(ex.Code, ex.Message, string.Empty);
+            var json = JsonSerializer.Serialize(response);
+            await context.Response.WriteAsync(json);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Unhandled Exception");
+            context.Response.StatusCode = 500;
 
-        // public async Task Invoke(HttpContext context)
-        // {
-        //     try
-        //     {
-        //         await _next(context); // 다음 미들웨어 호출
-        //     }
-            // catch (AcaException ex)
-            // {
-            //     _logger.LogWarning(ex, "AcaException 발생");
-            //     context.Response.StatusCode = 400;
-            //
-            //     var response = APIResponse.Send<string>(ex.Code, ex.Message, "");
-            //     var json = JsonSerializer.Serialize(response);
-            //
-            //     context.Response.ContentType = "application/json; charset=utf-8";
-            //     await context.Response.WriteAsync(json);
-            // }
-            // catch (Exception ex)
-            // {
-            //     _logger.LogError(ex, "Unhandled Exception");
-            //     context.Response.StatusCode = 500;
-            //
-            //     var response = APIResponse.InternalSeverError("서버 내부 오류가 발생했습니다.");
-            //     var json = JsonSerializer.Serialize(response);
-            //
-            //     context.Response.ContentType = "application/json; charset=utf-8";
-            //     await context.Response.WriteAsync(json);
-            // }
-        // }
+            var response = APIResponse.InternalSeverError("서버 내부 오류가 발생했습니다.");
+            var json = JsonSerializer.Serialize(response);
+
+            context.Response.ContentType = "application/json; charset=utf-8";
+            await context.Response.WriteAsync(json);
+        }
     }
 }
\ No newline at end of file
diff --git a/Program/Common/Model/AcaException.cs b/Program/Common/Model/AcaException.cs
index 918de6e..a6d069d 100644
--- a/Program/Common/Model/AcaException.cs
+++ b/Program/Common/Model/AcaException.cs
@@ -1,74 +1,25 @@
-namespace Back.Program.Common.Model
+using System.ComponentModel;
+
+namespace Back.Program.Common.Model;
+
+public static class ResposeCode
 {
-    /// <summary>
-    /// 입력 받은 토큰들(Access & Refresh) 자체에 문제가 있는 경우
-    /// </summary>
-    public class TokenException: Exception
-    {
-        public TokenException(string message) : base(message)
-        {
-        }
-    }
+    public const string Success = "000";
+    public const string InputErr = "100";
+    public const string OutputErr = "200";
+    public const string NetworkErr = "300";
+    public const string UnknownErr = "999";
+}
+public class AcaException : Exception
+{
+    public string Code { get; }
+    public int HttpStatus { get; }
 
-    /// <summary>
-    /// 리프레시 토큰이 만료가 나있는 경우
-    /// </summary>
-    public class RefreshRevokeException: Exception
+    public AcaException(string code, string message, int httpStatus = 400) : base(message)
     {
-        public RefreshRevokeException(string message) : base(message)
-        {
-        }
+        this.Code = code;
+        this.HttpStatus = httpStatus;
     }
+}
 
-    /// <summary>
-    /// 참조해야 하는 파일에서 오류가 발생하는 경우
-    /// </summary>
-    public class FileNotValidException : Exception
-    {
-        public FileNotValidException(string message) : base(message)
-        {
-        }
-    }
 
-    /// <summary>
-    /// 파일 내부에 값을 읽을 때 오류가 발생하는 경우
-    /// </summary>
-    public class FileContentNotFoundException : Exception
-    {
-        public FileContentNotFoundException(string message) : base(message)
-        {
-        }
-    }
-
-    /// <summary>
-    /// 외부 서비스에 연결시 연결 실패시
-    /// </summary>
-    public class ServiceConnectionFailedException : Exception
-    {
-        public ServiceConnectionFailedException(string message) : base(message)
-        {
-        
-        }
-    }
-
-    /// <summary>
-    /// PUSH 서비스 중 데이터 사용에 문제가 발생했을시
-    /// </summary>
-    public class PushInvalidException : Exception
-    {
-        public PushInvalidException(string message) : base(message)
-        {
-        
-        }
-    }
-    /// <summary>
-    /// 값이 있어야 하는데 NULL인 경우
-    /// </summary>
-    public class OutNULLException : Exception
-    {
-        public OutNULLException(string message) : base(message)
-        {
-        
-        }
-    }
-}
\ No newline at end of file
diff --git a/Program/Services/V1/PushService.cs b/Program/Services/V1/PushService.cs
index ed7e257..9177b7d 100644
--- a/Program/Services/V1/PushService.cs
+++ b/Program/Services/V1/PushService.cs
@@ -75,8 +75,7 @@ namespace Back.Program.Services.V1
                     if (!response.IsSuccessStatusCode)
                     {
                         var errorContent = await response.Content.ReadAsStringAsync();
-                        throw new ServiceConnectionFailedException($"[푸시] : APNS 통신 실패 - {errorContent}");
-
+                        throw new AcaException(ResposeCode.NetworkErr, $"[푸시] : APNS 통신 실패 - {errorContent}");
                     }
                 }
                 catch (Exception ex)
diff --git a/Program/Services/V1/RepositoryService.cs b/Program/Services/V1/RepositoryService.cs
index 07fbaef..9313c4a 100644
--- a/Program/Services/V1/RepositoryService.cs
+++ b/Program/Services/V1/RepositoryService.cs
@@ -223,8 +223,8 @@ namespace Back.Program.Services.V1
     
         public string ReadSummary(Type type, string name)
         {
-            var method = type.GetMethod(name) ?? throw new OutNULLException("swagger summary Load ERROR: NULL");
-            var att = method.GetCustomAttribute<CustomOperationAttribute>() ?? throw new OutNULLException("swagger summary Load ERROR: NULL");
+            var method = type.GetMethod(name) ?? throw new AcaException(ResposeCode.NetworkErr,"swagger summary Load ERROR: NULL");
+            var att = method.GetCustomAttribute<CustomOperationAttribute>() ?? throw new AcaException(ResposeCode.NetworkErr,"swagger summary Load ERROR: NULL");
             return att.Summary;
         }
     }