diff --git a/services/service_auto_image_pipeline.py b/services/service_auto_image_pipeline.py
index e1aa7e5..d131301 100644
--- a/services/service_auto_image_pipeline.py
+++ b/services/service_auto_image_pipeline.py
@@ -11,6 +11,7 @@ from urllib.parse import urlparse
 
 import httpx
 from dotenv import load_dotenv
+from PIL import Image
 
 from db.customer_db import CustomerDatabase
 from db.image_tasks_db import TaskStatus, db as task_db
@@ -90,6 +91,22 @@ class AutoImagePipelineService:
         suffix = suffix or dest_path.suffix or ".bin"
         return dest_path.with_suffix(suffix)
 
+    @staticmethod
+    def _normalize_image_for_gemini(image_path: Path) -> Path:
+        suffix = image_path.suffix.lower()
+        if suffix not in {".avif", ".webp"}:
+            return image_path
+
+        normalized_path = image_path.with_suffix(".jpg")
+        with Image.open(image_path) as img:
+            if img.mode not in ("RGB", "L"):
+                img = img.convert("RGB")
+            img.save(normalized_path, format="JPEG", quality=95)
+        logger.info(
+            f"[AutoImagePipeline] 已转换图片格式供Gemini使用: src={image_path} normalized={normalized_path}"
+        )
+        return normalized_path
+
     async def _download_image(self, image_url: str, dest_path: Path) -> Path:
         dest_path.parent.mkdir(parents=True, exist_ok=True)
         timeout = httpx.Timeout(60.0, connect=20.0)
@@ -239,6 +256,7 @@ class AutoImagePipelineService:
             )
             try:
                 input_path = await self._download_image(image_url, input_path)
+                input_path = self._normalize_image_for_gemini(input_path)
                 success, message, data = await gemini_service.extract_pattern(
                     str(input_path),
                     str(output_path),