diff --git a/app/api/enhance/route.ts b/app/api/enhance/route.ts
index 1492b5d..7736e43 100644
--- a/app/api/enhance/route.ts
+++ b/app/api/enhance/route.ts
@@ -420,39 +420,44 @@ export async function POST(request: NextRequest) {
 
     // ========== 备用API处理路径 (Real-ESRGAN) ==========
     if (useBackupApi) {
-      console.log("[Enhance API] 使用Real-ESRGAN备用API处理...");
+      console.log("[Enhance API] 使用Real-ESRGAN备用API处理（URL方式）...");
       
       try {
-        // 使用Base64方式调用Real-ESRGAN API
-        const result = await processWithRealESRGANBase64(imageBase64, {
+        // 步骤1: 先将Base64图片上传到S3获取公开可访问的URL
+        console.log(`[Enhance-RealESRGAN] 📤 步骤1: 上传原图到S3获取URL...`);
+        const tempUploadResult = await uploadBase64ToS3(imageBase64, "image/jpeg");
+        const sourceImageUrl = tempUploadResult.original;
+        console.log(`[Enhance-RealESRGAN] ✅ 原图已上传，URL: ${sourceImageUrl}`);
+        
+        // 步骤2: 使用URL方式调用Real-ESRGAN API
+        console.log(`[Enhance-RealESRGAN] 🔄 步骤2: 调用Real-ESRGAN API处理...`);
+        const result = await processWithRealESRGAN(sourceImageUrl, {
           backupApiUrl: config.backupApiUrl!,
           backupApiKey: config.backupApiKey!,
           backupScale: config.backupScale || "4",
           backupModel: config.backupModel || "RealESRGAN_x4plus",
         });
         
-        // 上传处理后的图片到S3
+        // 步骤3: Real-ESRGAN API返回的URL就是处理后的图片
+        // 需要重新上传到我们的S3（因为Real-ESRGAN返回的URL可能在另一个S3桶）
+        console.log(`[Enhance-RealESRGAN] 📤 步骤3: 上传处理后的图片到S3...`);
         let thumbnailUrl: string;
         let originalUrl: string;
         
         try {
-          console.log(`[Enhance-RealESRGAN] 📤 上传处理后的图片到S3...`);
           const uploadResult = await uploadBase64ToS3(result.imageBase64, "image/png");
           thumbnailUrl = uploadResult.thumbnail;
           originalUrl = uploadResult.original;
-          console.log(`[Enhance-RealESRGAN] ✅ 上传成功: ${originalUrl}`);
+          console.log(`[Enhance-RealESRGAN] ✅ 处理后图片已上传: ${originalUrl}`);
         } catch (uploadError) {
           console.error("[Enhance-RealESRGAN] ❌ 上传到S3失败:", uploadError);
-          return NextResponse.json(
-            { 
-              error: "图片上传到存储桶失败", 
-              detail: uploadError instanceof Error ? uploadError.message : "未知错误" 
-            },
-            { status: 500 }
-          );
+          // 如果上传失败，直接使用Real-ESRGAN返回的URL
+          console.log(`[Enhance-RealESRGAN] ⚠️ 使用Real-ESRGAN返回的URL作为备选: ${result.imageUrl}`);
+          thumbnailUrl = result.imageUrl;
+          originalUrl = result.imageUrl;
         }
         
-        // 保存到数据库
+        // 步骤4: 保存到数据库
         try {
           const [savedImage] = await db.insert(generatedImage).values({
             userId,
@@ -471,13 +476,14 @@ export async function POST(request: NextRequest) {
         }
         
         // 返回结果
+        console.log(`[Enhance-RealESRGAN] ✅ 全部完成，总耗时: ${result.processingTime.toFixed(2)}秒`);
         return NextResponse.json({
           success: true,
           image_base64: result.imageBase64,
           thumbnail_url: thumbnailUrl,
           original_url: originalUrl,
           processing_time: result.processingTime,
-          api_type: "realesrgan",
+          api_type: "realesrgan-url",
         });
         
       } catch (error) {