diff --git a/api/app/core/config.py b/api/app/core/config.py
index 3bc77376..25713967 100644
--- a/api/app/core/config.py
+++ b/api/app/core/config.py
@@ -114,6 +114,7 @@ class Settings:
     S3_ACCESS_KEY_ID: str = os.getenv("S3_ACCESS_KEY_ID", "")
     S3_SECRET_ACCESS_KEY: str = os.getenv("S3_SECRET_ACCESS_KEY", "")
     S3_BUCKET_NAME: str = os.getenv("S3_BUCKET_NAME", "")
+    S3_ENDPOINT_URL: str = os.getenv("S3_ENDPOINT_URL", "")
 
     # VOLC ASR settings
     VOLC_APP_KEY: str = os.getenv("VOLC_APP_KEY", "")
diff --git a/api/app/core/storage/factory.py b/api/app/core/storage/factory.py
index 52749e3c..93fa847b 100644
--- a/api/app/core/storage/factory.py
+++ b/api/app/core/storage/factory.py
@@ -85,6 +85,7 @@ class StorageFactory:
                 access_key_id=settings.S3_ACCESS_KEY_ID,
                 secret_access_key=settings.S3_SECRET_ACCESS_KEY,
                 bucket_name=settings.S3_BUCKET_NAME,
+                endpoint_url=settings.S3_ENDPOINT_URL,
             )
 
         else:
diff --git a/api/app/core/storage/s3.py b/api/app/core/storage/s3.py
index e59da8d5..4ecaad4e 100644
--- a/api/app/core/storage/s3.py
+++ b/api/app/core/storage/s3.py
@@ -35,6 +35,19 @@ class S3Storage(StorageBackend):
         bucket_name: The name of the S3 bucket.
         region: The AWS region.
     """
+    AMAZON_S3_ENDPOINT_MAP = {
+        "us-east-1": "https://s3.us-east-1.amazonaws.com",  # 特殊：无地域后缀
+        "us-east-2": "https://s3.us-east-2.amazonaws.com",
+        "us-west-1": "https://s3.us-west-1.amazonaws.com",
+        "us-west-2": "https://s3.us-west-2.amazonaws.com",
+        "ap-east-1": "https://s3.ap-east-1.amazonaws.com",  # 香港
+        "ap-southeast-1": "https://s3.ap-southeast-1.amazonaws.com",  # 新加坡
+        "ap-southeast-2": "https://s3.ap-southeast-2.amazonaws.com",  # 悉尼
+        "ap-northeast-1": "https://s3.ap-northeast-1.amazonaws.com",  # 东京
+        "eu-central-1": "https://s3.eu-central-1.amazonaws.com",  # 法兰克福
+        "eu-west-1": "https://s3.eu-west-1.amazonaws.com",  # 爱尔兰
+        # 可根据需要扩展其他地域
+    }
 
     def __init__(
         self,
@@ -42,6 +55,7 @@ class S3Storage(StorageBackend):
         access_key_id: str,
         secret_access_key: str,
         bucket_name: str,
+        endpoint_url: Optional[str] = None
     ):
         """
         Initialize the S3Storage backend.
@@ -51,6 +65,7 @@ class S3Storage(StorageBackend):
             access_key_id: The AWS access key ID.
             secret_access_key: The AWS secret access key.
             bucket_name: The name of the S3 bucket.
+            endpoint_url: The complete URL to use for the constructed client.
 
         Raises:
             StorageConfigError: If any required configuration is missing.
@@ -69,10 +84,19 @@ class S3Storage(StorageBackend):
         self.region = region
         self.bucket_name = bucket_name
 
+        if not endpoint_url:
+            # 优先匹配内置映射表（解决特殊地域）
+            if region in self.AMAZON_S3_ENDPOINT_MAP:
+                endpoint_url = self.AMAZON_S3_ENDPOINT_MAP[region]
+            # 兜底：通用拼接（适配未配置的新地域）
+            else:
+                endpoint_url = f"https://s3.{region}.amazonaws.com"
+
         try:
             self.client = boto3.client(
                 "s3",
                 region_name=region,
+                endpoint_url=endpoint_url,
                 aws_access_key_id=access_key_id,
                 aws_secret_access_key=secret_access_key,
             )