diff --git a/qcloud_cos/cos_client.py b/qcloud_cos/cos_client.py
index a8150287..88aed1bd 100644
--- a/qcloud_cos/cos_client.py
+++ b/qcloud_cos/cos_client.py
@@ -27,23 +27,28 @@
 
 class CosConfig(object):
     """config类，保存用户相关信息"""
-    def __init__(self, Appid=None, Region=None, Secret_id=None, Secret_key=None, Token=None, Scheme=None, Timeout=None, Access_id=None, Access_key=None):
+    def __init__(self, Appid=None, Region=None, SecretId=None, SecretKey=None, Token=None, Scheme=None, Timeout=None,
+                 Access_id=None, Access_key=None, Secret_id=None, Secret_key=None, Endpoint=None):
         """初始化，保存用户的信息
 
         :param Appid(string): 用户APPID.
         :param Region(string): 地域信息.
-        :param Secret_id(string): 秘钥SecretId.
-        :param Secret_key(string): 秘钥SecretKey.
+        :param SecretId(string): 秘钥SecretId.
+        :param SecretKey(string): 秘钥SecretKey.
         :param Token(string): 临时秘钥使用的token.
-        :param Schema(string): http/https
+        :param Schema(string): http/https.
         :param Timeout(int): http超时时间.
         :param Access_id(string): 秘钥AccessId(兼容).
         :param Access_key(string): 秘钥AccessKey(兼容).
+        :param Secret_id(string): 秘钥SecretId(兼容).
+        :param Secret_key(string): 秘钥SecretKey(兼容).
+        :param Endpoint(string): endpoint.
         """
         self._appid = to_unicode(Appid)
-        self._region = format_region(Region)
         self._token = to_unicode(Token)
         self._timeout = Timeout
+        self._region = Region
+        self._endpoint = format_endpoint(Endpoint, Region)
 
         if Scheme is None:
             Scheme = u'https'
@@ -53,7 +58,10 @@ def __init__(self, Appid=None, Region=None, Secret_id=None, Secret_key=None, Tok
         self._scheme = Scheme
 
         # 兼容(SecretId,SecretKey)以及(AccessId,AccessKey)
-        if(Secret_id and Secret_key):
+        if(SecretId and SecretKey):
+            self._secret_id = to_unicode(SecretId)
+            self._secret_key = to_unicode(SecretKey)
+        elif(Secret_id and Secret_key):
             self._secret_id = to_unicode(Secret_id)
             self._secret_key = to_unicode(Secret_key)
         elif(Access_id and Access_key):
@@ -62,7 +70,7 @@ def __init__(self, Appid=None, Region=None, Secret_id=None, Secret_key=None, Tok
         else:
             raise CosClientError('SecretId and SecretKey is Required!')
 
-    def uri(self, bucket, path=None, scheme=None, region=None):
+    def uri(self, bucket, path=None, endpoint=None):
         """拼接url
 
         :param bucket(string): 存储桶名称.
@@ -70,10 +78,10 @@ def uri(self, bucket, path=None, scheme=None, region=None):
         :return(string): 请求COS的URL地址.
         """
         bucket = format_bucket(bucket, self._appid)
-        if scheme is None:
-            scheme = self._scheme
-        if region is None:
-            region = self._region
+        scheme = self._scheme
+        if endpoint is None:
+            endpoint = self._endpoint
+
         if path is not None:
             if not path:
                 raise CosClientError("Key is required not empty")
@@ -81,17 +89,17 @@ def uri(self, bucket, path=None, scheme=None, region=None):
             if path[0] == u'/':
                 path = path[1:]
             path = quote(to_bytes(path), '/-_.~')
-            url = u"{scheme}://{bucket}.{region}.myqcloud.com/{path}".format(
+            url = u"{scheme}://{bucket}.{endpoint}/{path}".format(
                 scheme=to_unicode(scheme),
                 bucket=to_unicode(bucket),
-                region=to_unicode(region),
+                endpoint=to_unicode(endpoint),
                 path=to_unicode(path)
             )
         else:
-            url = u"{scheme}://{bucket}.{region}.myqcloud.com/".format(
-                scheme=self._scheme,
+            url = u"{scheme}://{bucket}.{endpoint}/".format(
+                scheme=to_unicode(scheme),
                 bucket=to_unicode(bucket),
-                region=self._region
+                endpoint=to_unicode(endpoint)
             )
         return url
 
@@ -1988,11 +1996,11 @@ def upload_file(self, Bucket, Key, LocalFilePath, PartSize=1, MAXThread=5, **kwa
 
     def _inner_head_object(self, CopySource):
         """查询源文件的长度"""
-        bucket, path, region, versionid = get_copy_source_info(CopySource)
+        bucket, path, endpoint, versionid = get_copy_source_info(CopySource)
         params = {}
         if versionid != '':
             params['versionId'] = versionid
-        url = self._conf.uri(bucket=bucket, path=path, scheme=self._conf._scheme, region=region)
+        url = self._conf.uri(bucket=bucket, path=path, endpoint=endpoint)
         rt = self.send_request(
             method='HEAD',
             url=url,
@@ -2017,13 +2025,9 @@ def _upload_part_copy(self, bucket, key, part_number, upload_id, copy_source, co
         md5_lst.append({'PartNumber': part_number, 'ETag': rt['ETag']})
         return None
 
-    def _check_same_region(self, dst_region, CopySource):
-        if 'Region' in CopySource:
-            src_region = CopySource['Region']
-            src_region = format_region(src_region)
-        else:
-            raise CosClientError('CopySource Need Parameter Region')
-        if src_region == dst_region:
+    def _check_same_region(self, dst_endpoint, CopySource):
+        src_endpoint = get_copy_source_info(CopySource)[2]
+        if src_endpoint == dst_endpoint:
             return True
         return False
 
@@ -2053,7 +2057,7 @@ def copy(self, Bucket, Key, CopySource, CopyStatus='Copy', PartSize=10, MAXThrea
             )
         """
         # 同园区直接走copy_object
-        if self._check_same_region(self._conf._region, CopySource):
+        if self._check_same_region(self._conf._endpoint, CopySource):
             response = self.copy_object(Bucket=Bucket, Key=Key, CopySource=CopySource, CopyStatus=CopyStatus, **kwargs)
             return response
 
@@ -2302,7 +2306,7 @@ def change_object_storage_class(self, Bucket, Key, StorageClass):
         copy_source = {
             'Bucket': Bucket,
             'Key': Key,
-            'Region': self._conf._region,
+            'Endpoint': self._conf._endpoint,
             'Appid': self._conf._appid
         }
         response = self.copy_object(
@@ -2336,7 +2340,7 @@ def update_object_meta(self, Bucket, Key, **kwargs):
         copy_source = {
             'Bucket': Bucket,
             'Key': Key,
-            'Region': self._conf._region,
+            'Endpoint': self._conf._endpoint,
             'Appid': self._conf._appid
         }
         response = self.copy_object(
diff --git a/qcloud_cos/cos_comm.py b/qcloud_cos/cos_comm.py
index 612e5b96..72acc0aa 100644
--- a/qcloud_cos/cos_comm.py
+++ b/qcloud_cos/cos_comm.py
@@ -192,6 +192,17 @@ def format_values(data):
     return data
 
 
+def format_endpoint(endpoint, region):
+    """格式化终端域名"""
+    if not endpoint and not region:
+        raise CosClientError("Region or Endpoint is required not empty!")
+    if not endpoint:
+        region = format_region(region)
+        return u"{region}.myqcloud.com".format(region=region)
+    else:
+        return to_unicode(endpoint)
+
+
 def format_region(region):
     """格式化地域"""
     if not isinstance(region, string_types):
@@ -267,6 +278,8 @@ def get_copy_source_info(CopySource):
     """获取拷贝源的所有信息"""
     appid = u""
     versionid = u""
+    region = u""
+    endpoint = u""
     if 'Appid' in CopySource:
         appid = CopySource['Appid']
     if 'Bucket' in CopySource:
@@ -276,27 +289,27 @@ def get_copy_source_info(CopySource):
         raise CosClientError('CopySource Need Parameter Bucket')
     if 'Region' in CopySource:
         region = CopySource['Region']
-        region = format_region(region)
-    else:
-        raise CosClientError('CopySource Need Parameter Region')
+    if 'Endpoint' in CopySource:
+        endpoint = CopySource['Endpoint']
+    endpoint = format_endpoint(endpoint, region)
     if 'Key' in CopySource:
         path = to_unicode(CopySource['Key'])
     else:
         raise CosClientError('CopySource Need Parameter Key')
     if 'VersionId' in CopySource:
         versionid = to_unicode(CopySource['VersionId'])
-    return bucket, path, region, versionid
+    return bucket, path, endpoint, versionid
 
 
 def gen_copy_source_url(CopySource):
     """拼接拷贝源url"""
-    bucket, path, region, versionid = get_copy_source_info(CopySource)
+    bucket, path, endpoint, versionid = get_copy_source_info(CopySource)
     path = format_path(path)
     if versionid != u'':
         path = path + u'?versionId=' + versionid
-    url = u"{bucket}.{region}.myqcloud.com/{path}".format(
+    url = u"{bucket}.{endpoint}/{path}".format(
             bucket=bucket,
-            region=region,
+            endpoint=endpoint,
             path=path
             )
     return url
diff --git a/qcloud_cos/demo.py b/qcloud_cos/demo.py
index 5b5afe92..89329ecc 100644
--- a/qcloud_cos/demo.py
+++ b/qcloud_cos/demo.py
@@ -21,7 +21,7 @@
 secret_key = 'csivKvxxrMvSvQpMWHuIz12pThQQlWRW'     # 替换为用户的secret_key
 region = 'ap-beijing-1'    # 替换为用户的region
 token = ''                 # 使用临时秘钥需要传入Token，默认为空,可不填
-config = CosConfig(Region=region, Secret_id=secret_id, Secret_key=secret_key, Token=token)  # 获取配置对象
+config = CosConfig(Region=region, SecretId=secret_id, SecretKey=secret_key, Token=token)  # 获取配置对象
 client = CosS3Client(config)
 
 # 文件流 简单上传
diff --git a/ut/test.py b/ut/test.py
index 937496b2..9afcefde 100644
--- a/ut/test.py
+++ b/ut/test.py
@@ -18,8 +18,9 @@
 special_file_name = "中文" + "→↓←→↖↗↙↘! \"#$%&'()*+,-./0123456789:;<=>@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~"
 conf = CosConfig(
     Region="ap-beijing-1",
-    Secret_id=SECRET_ID,
-    Secret_key=SECRET_KEY
+    SecretId=SECRET_ID,
+    SecretKey=SECRET_KEY,
+    Endpoint="cos.ap-beijing-1.myqcloud.com"  # support endpoint
 )
 client = CosS3Client(conf)