diff --git a/routes/ai.js b/routes/ai.js
index 7059944..156b7ff 100644
--- a/routes/ai.js
+++ b/routes/ai.js
@@ -148,9 +148,23 @@ router.post('/recognize-product', async (ctx) => {
   "confidence": 0到1之间的数字（识别置信度）
 }`;
 
-    const imageUrl = `data:image/jpeg;base64,${imageBase64}`;
+    // omni 模型不支持 data URI，先保存为文件再用 URL
+    const imageBuffer = Buffer.from(imageBase64, 'base64');
+    const fileName = `ai_${Date.now()}_${Math.random().toString(36).slice(2, 8)}.jpg`;
+    const filePath = path.join(__dirname, '..', 'public', 'uploads', fileName);
+    
+    // 确保 uploads 目录存在
+    const uploadsDir = path.join(__dirname, '..', 'public', 'uploads');
+    if (!fs.existsSync(uploadsDir)) {
+      fs.mkdirSync(uploadsDir, { recursive: true });
+    }
+    fs.writeFileSync(filePath, imageBuffer);
 
-    console.log('Calling Qwen Omni API with image...');
+    // 构造公网可访问的 URL
+    const serverHost = process.env.SERVER_HOST || 'http://110.42.255.239:3006';
+    const imageUrl = `${serverHost}/uploads/${fileName}`;
+
+    console.log('Calling Qwen Omni API with image:', imageUrl);
     const response = await fetch(AI_API_URL, {
       method: 'POST',
       headers: {