diff --git a/apps/cs/app/api/proxy/[...url]/route.ts b/apps/cs/app/api/proxy/[...url]/route.ts
index 8e9a39cae..f42400d1b 100644
--- a/apps/cs/app/api/proxy/[...url]/route.ts
+++ b/apps/cs/app/api/proxy/[...url]/route.ts
@@ -56,10 +56,32 @@ async function handler(
 
     if (!result.ok) {
       console.error(`[BFF Proxy Error] Backend returned status ${result.status} for ${params.url.join("/")}`);
+      let errorText = "";
       try {
-        const errorText = await result.text();
+        errorText = await result.text();
         console.error(`[BFF Proxy Error Body] ${errorText}`);
       } catch (err) {}
+
+      if (result.status === 503) {
+        const serviceName = params.url[0] || "user-service";
+        return NextResponse.json(
+          { message: `${serviceName} 서비스와의 연결이 불안정 합니다. 관리자에게 연락해 주십시오.` },
+          { status: 503 },
+        );
+      }
+
+      if (result.status !== 500 && errorText) {
+        try {
+          const errorJson = JSON.parse(errorText);
+          if (errorJson && errorJson.message) {
+            return NextResponse.json(
+              { message: errorJson.message },
+              { status: result.status },
+            );
+          }
+        } catch (e) {}
+      }
+
       return NextResponse.json(
         { message: "Invalid Credentials" },
         { status: 401 },