diff --git a/database/mongodb_store_base.py b/database/mongodb_store_base.py
index 771974aeb..b2003ef2e 100644
--- a/database/mongodb_store_base.py
+++ b/database/mongodb_store_base.py
@@ -103,14 +103,10 @@ async def get_collection(self, collection_suffix: str) -> AsyncIOMotorCollection
         return db[collection_name]
 
     async def save_or_update(self, collection_suffix: str, query: Dict, data: Dict) -> bool:
-        """Save or update data (upsert)"""
-        try:
-            collection = await self.get_collection(collection_suffix)
-            await collection.update_one(query, {"$set": data}, upsert=True)
-            return True
-        except Exception as e:
-            utils.logger.error(f"[MongoDBStoreBase] Save failed ({self.collection_prefix}_{collection_suffix}): {e}")
-            return False
+        """Upsert data; propagate failures so callers cannot report false success."""
+        collection = await self.get_collection(collection_suffix)
+        await collection.update_one(query, {"$set": data}, upsert=True)
+        return True
 
     async def find_one(self, collection_suffix: str, query: Dict) -> Optional[Dict]:
         """Query a single record"""
diff --git a/docs/mongodb-write-errors.md b/docs/mongodb-write-errors.md
new file mode 100644
index 000000000..39d4568a4
--- /dev/null
+++ b/docs/mongodb-write-errors.md
@@ -0,0 +1,5 @@
+# MongoDB 写入失败处理
+
+MongoDB upsert 成功仍返回 True；写入失败现在抛出原始异常。
+平台 store 只有在写入成功后才会执行后续成功日志。自定义调用方应处理异常或让任务失败，
+不要继续依赖 False 表示失败。本次没有自动重试，以免隐藏持续性配置/权限错误。
diff --git a/tests/test_mongodb_errors.py b/tests/test_mongodb_errors.py
new file mode 100644
index 000000000..263766a25
--- /dev/null
+++ b/tests/test_mongodb_errors.py
@@ -0,0 +1,54 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2025 relakkes@gmail.com
+#
+# This file is part of MediaCrawler project.
+# Repository: https://github.com/NanmiCoder/MediaCrawler/blob/main/tests/test_mongodb_errors.py
+# GitHub: https://github.com/NanmiCoder
+# Licensed under NON-COMMERCIAL LEARNING LICENSE 1.1
+#
+# 声明：本代码仅供学习和研究目的使用。使用者应遵守以下原则：
+# 1. 不得用于任何商业用途。
+# 2. 使用时应遵守目标平台的使用条款和robots.txt规则。
+# 3. 不得进行大规模爬取或对平台造成运营干扰。
+# 4. 应合理控制请求频率，避免给目标平台带来不必要的负担。
+# 5. 不得用于任何非法或不当的用途。
+#
+# 详细许可条款请参阅项目根目录下的LICENSE文件。
+# 使用本代码即表示您同意遵守上述原则和LICENSE中的所有条款。
+
+from unittest.mock import AsyncMock, Mock
+
+import pytest
+
+from database.mongodb_store_base import MongoDBStoreBase
+
+
+@pytest.mark.asyncio
+async def test_mongodb_failed_write_reaches_the_caller(monkeypatch):
+    store = MongoDBStoreBase("xhs")
+    collection = Mock(update_one=AsyncMock(side_effect=OSError("database unavailable")))
+    monkeypatch.setattr(store, "get_collection", AsyncMock(return_value=collection))
+    with pytest.raises(OSError, match="database unavailable"):
+        await store.save_or_update("contents", {"note_id": "1"}, {"title": "test"})
+
+
+@pytest.mark.asyncio
+async def test_mongodb_successful_upsert_retains_its_contract(monkeypatch):
+    store = MongoDBStoreBase("xhs")
+    collection = Mock(update_one=AsyncMock())
+    monkeypatch.setattr(store, "get_collection", AsyncMock(return_value=collection))
+    assert await store.save_or_update("contents", {"note_id": "1"}, {"title": "test"}) is True
+    collection.update_one.assert_awaited_once_with({"note_id": "1"}, {"$set": {"title": "test"}}, upsert=True)
+
+
+@pytest.mark.asyncio
+async def test_mongodb_platform_store_does_not_log_false_success(monkeypatch):
+    from store.xhs._store_impl import XhsMongoStoreImplement
+    from tools import utils
+    store = XhsMongoStoreImplement()
+    monkeypatch.setattr(store.mongo_store, "get_collection", AsyncMock(side_effect=OSError("offline")))
+    log = Mock()
+    monkeypatch.setattr(utils.logger, "info", log)
+    with pytest.raises(OSError, match="offline"):
+        await store.store_content({"note_id": "1", "title": "example"})
+    assert not any("Saved note" in str(call) for call in log.call_args_list)