diff --git a/api_v1/utils/tencentcloud_tiia.py b/api_v1/utils/tencentcloud_tiia.py
index fe9f5d1..3b6c40b 100644
--- a/api_v1/utils/tencentcloud_tiia.py
+++ b/api_v1/utils/tencentcloud_tiia.py
@@ -24,6 +24,26 @@ def _truncate(s: str, max_len: int) -> str:
         return s
     return s[:max_len]
 
+def _default_tiia_tags_for_image_url(image_url: str) -> str:
+    """
+    TencentCloud TIIA `Tags` is a string field; in practice people often put JSON string inside.
+    We store the original accessible image URL there so SearchImage results can carry it back.
+    """
+    payload = {'imageUrl': (image_url or '').strip()}
+    # Keep it compact and readable.
+    return json.dumps(payload, ensure_ascii=False, separators=(',', ':'))
+
+def _compute_tiia_pic_name(*, image_url: str, pic_prefix: str) -> str:
+    parsed = urlparse(image_url)
+    basename = (parsed.path.rsplit('/', 1)[-1] or '').strip()
+    if basename:
+        pic_name = f'{pic_prefix}_{basename}'
+    else:
+        # Fallback: keep old behavior (random) to avoid breaking existing uploaded naming.
+        uid = uuid.uuid4().hex
+        pic_name = f'{pic_prefix}_{uid}'
+    return _truncate(pic_name, 128)
+
 
 class SimpleRateLimiter:
     """
@@ -154,7 +174,7 @@ def search_image_url_in_tencent_tiia(
     return json.loads(resp.to_json_string())
 
 
-def upload_image_url_to_tencent_tiia(*, image_url: str, entity_id: str) -> dict:
+def upload_image_url_to_tencent_tiia(*, image_url: str, entity_id: str, tags: str | None = None, custom_content: str | None = None) -> dict:
     """
     Upload an image by URL to Tencent Cloud TIIA gallery using CreateImage.
 
@@ -202,12 +222,9 @@ def upload_image_url_to_tencent_tiia(*, image_url: str, entity_id: str) -> dict:
     pic_prefix = (getattr(settings, 'TENCENTCLOUD_TIIA_PIC_NAME_PREFIX', None) or 'plate_order').strip() or 'plate_order'
 
     # CreateImage requires PicName; we auto-generate it.
-    uid = uuid.uuid4().hex
     # NOTE: 云端对字段长度通常有限制，这里做一个保守截断，避免超长导致 400。
     entity_id = _truncate(entity_id, 128)
-    basename = (parsed.path.rsplit('/', 1)[-1] or '').strip()
-    pic_name = f'{pic_prefix}_{basename}' if basename else f'{pic_prefix}_{uid}'
-    pic_name = _truncate(pic_name, 128)
+    pic_name = _compute_tiia_pic_name(image_url=image_url, pic_prefix=pic_prefix)
 
     try:
         from tencentcloud.common import credential
@@ -229,10 +246,69 @@ def upload_image_url_to_tencent_tiia(*, image_url: str, entity_id: str) -> dict:
     req.EntityId = str(entity_id)
     req.PicName = str(pic_name)
     req.ImageUrl = str(image_url)
+    # Store accessible URL into tags so SearchImage result can carry it back.
+    # (UpdateImage only supports Tags, not CustomContent, so Tags is the primary field.)
+    req.Tags = str(tags) if tags is not None else _default_tiia_tags_for_image_url(image_url)
+    # Also store it in CustomContent for human readability (CreateImage supports it).
+    req.CustomContent = str(custom_content) if custom_content is not None else str(image_url)
 
     resp = client.CreateImage(req)
     return json.loads(resp.to_json_string())
 
+
+def update_image_tags_in_tencent_tiia(*, entity_id: str, pic_name: str, tags: str) -> dict:
+    """
+    Update an existing image metadata in TencentCloud TIIA gallery.
+
+    Note: TencentCloud `UpdateImage` supports updating `Tags` only (no CustomContent).
+    """
+    entity_id = (entity_id or '').strip()
+    pic_name = (pic_name or '').strip()
+    tags = (tags or '').strip()
+    if not entity_id:
+        raise ValueError('entity_id 不能为空')
+    if not pic_name:
+        raise ValueError('pic_name 不能为空')
+    if not tags:
+        raise ValueError('tags 不能为空')
+
+    group_id = (getattr(settings, 'TENCENTCLOUD_TIIA_GROUP_ID', '') or '').strip()
+    if not group_id:
+        raise ValueError('缺少 settings: TENCENTCLOUD_TIIA_GROUP_ID')
+
+    secret_id = (getattr(settings, 'TENCENTCLOUD_SECRET_ID', '') or '').strip()
+    secret_key = (getattr(settings, 'TENCENTCLOUD_SECRET_KEY', '') or '').strip()
+    token = (getattr(settings, 'TENCENTCLOUD_TOKEN', '') or '').strip() or None
+    if not secret_id or not secret_key:
+        raise ValueError('缺少 settings: TENCENTCLOUD_SECRET_ID / TENCENTCLOUD_SECRET_KEY')
+
+    region = (getattr(settings, 'TENCENTCLOUD_TIIA_REGION', None) or 'ap-guangzhou').strip()
+    endpoint = (getattr(settings, 'TENCENTCLOUD_TIIA_ENDPOINT', None) or 'tiia.tencentcloudapi.com').strip()
+
+    try:
+        from tencentcloud.common import credential
+        from tencentcloud.common.profile.client_profile import ClientProfile
+        from tencentcloud.common.profile.http_profile import HttpProfile
+        from tencentcloud.tiia.v20190529 import tiia_client, models
+    except Exception as e:  # pragma: no cover
+        raise RuntimeError(
+            "TencentCloud SDK 未安装或不可用，请先安装依赖：tencentcloud-sdk-python"
+        ) from e
+
+    cred = credential.Credential(secret_id, secret_key, token)
+    http_profile = HttpProfile(endpoint=endpoint, reqTimeout=30)
+    client_profile = ClientProfile(httpProfile=http_profile)
+    client = tiia_client.TiiaClient(cred, region, client_profile)
+
+    req = models.UpdateImageRequest()
+    req.GroupId = str(group_id)
+    req.EntityId = _truncate(str(entity_id), 128)
+    req.PicName = _truncate(str(pic_name), 128)
+    req.Tags = str(tags)
+
+    resp = client.UpdateImage(req)
+    return json.loads(resp.to_json_string())
+
 def _extract_urls_from_plate_image(plate_image) -> list[str]:
     """
     从 PlateOrder.plate_image(JSON) 中提取所有可能的图片 URL/Path。
@@ -349,5 +425,6 @@ __all__ = [
     'upload_image_url_to_tencent_tiia',
     'search_image_url_in_tencent_tiia',
     'upload_plate_order_images_to_tencent_tiia',
+    'update_image_tags_in_tencent_tiia',
 ]