diff --git a/Basis/Logger.py b/Basis/Logger.py
deleted file mode 100644
index cf8f9b8..0000000
--- a/Basis/Logger.py
+++ /dev/null
@@ -1,37 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-
-import sys
-import logging
-from colorlog import ColoredFormatter
-from Basis.Constant import LogLevel, LogFile
-
-logLevel = {  # log level
-    'debug': logging.DEBUG,
-    'info': logging.INFO,
-    'warning': logging.WARNING,
-    'error': logging.ERROR,
-    'critical': logging.CRITICAL
-}[LogLevel.lower()]
-dateFormat = '%Y-%m-%d %H:%M:%S'  # log date format
-logFormat = '[%(asctime)s] [%(levelname)s] %(message)s (%(module)s.%(funcName)s)'  # log format
-
-logging.basicConfig(
-    level = logLevel,
-    format = logFormat,
-    datefmt = dateFormat,
-    filename = LogFile,
-)
-logHandler = logging.StreamHandler(stream = sys.stdout)
-logHandler.setFormatter(ColoredFormatter(
-    fmt = '%(log_color)s' + logFormat,
-    datefmt = dateFormat,
-    log_colors = {
-        'DEBUG': 'white',
-        'INFO': 'green',
-        'WARNING': 'yellow',
-        'ERROR': 'red',
-        'CRITICAL': 'bold_red',
-    }
-))
-logging.getLogger().addHandler(logHandler)
diff --git a/Decoder/Shadowsocks.py b/Decoder/Shadowsocks.py
index a2ac210..26ee0f6 100644
--- a/Decoder/Shadowsocks.py
+++ b/Decoder/Shadowsocks.py
@@ -5,19 +5,18 @@
 # Plain / Common: https://shadowsocks.org/guide/configs.html#uri-and-qr-code
 
 import copy
-from Basis.Logger import logging
+from Utils.Logger import logger
 from Basis.Exception import decodeException
-from Basis.Functions import base64Decode, urlDecode
+from Utils.Common import urlDecode, base64Decode
 
 ssBasicConfig = {
     'type': 'ss',
     'info': {}
 }
 
-
 def checkPrefix(url: str) -> str:  # check url prefix and remove it
     if not url.startswith('ss://'):
-        logging.debug('Shadowsocks url should start with `ss://`')
+        logger.debug('Shadowsocks url should start with `ss://`')
         raise decodeException('Shadowsocks prefix error')
     return url[5:]
 
@@ -39,12 +38,12 @@ def ssPlain(url: str) -> dict:
     FORMAT: ss://method:password@hostname:port[#TAG]
     """
     config = copy.deepcopy(ssBasicConfig)
-    logging.debug('Shadowsocks plain decode -> %s' % url)
+    logger.debug('Shadowsocks plain decode -> %s' % url)
     url, config['name'] = splitTag(checkPrefix(url), False)
     userinfo, url = url.rsplit('@', 1)
     config['info']['server'], config['info']['port'] = url.rsplit(':', 1)
     config['info']['method'], config['info']['passwd'] = userinfo.split(':', 1)
-    logging.debug('Shadowsocks plain decode release -> %s', config)
+    logger.debug('Shadowsocks plain decode release -> %s', config)
     return config
 
 
@@ -54,12 +53,12 @@ def ssCommon(url: str) -> dict:
             base64('method:password@hostname:port')
     """
     config = copy.deepcopy(ssBasicConfig)
-    logging.debug('Shadowsocks common decode -> %s' % url)
+    logger.debug('Shadowsocks common decode -> %s' % url)
     url, config['name'] = splitTag(checkPrefix(url))
     userinfo, url = base64Decode(url).rsplit('@', 1)
     config['info']['server'], config['info']['port'] = url.rsplit(':', 1)
     config['info']['method'], config['info']['passwd'] = userinfo.split(':', 1)
-    logging.debug('Shadowsocks common decode release -> %s', config)
+    logger.debug('Shadowsocks common decode release -> %s', config)
     return config
 
 
@@ -69,7 +68,7 @@ def sip002(url: str) -> dict:
             userinfo => method:password or websafe-base64-encode-utf8(method:password)
     """
     config = copy.deepcopy(ssBasicConfig)
-    logging.debug('Shadowsocks sip002 decode -> %s' % url)
+    logger.debug('Shadowsocks sip002 decode -> %s' % url)
     url, config['name'] = splitTag(checkPrefix(url))
     userinfo, url = url.rsplit('@', 1)
     try:
@@ -86,5 +85,5 @@ def sip002(url: str) -> dict:
             'param': '' if len(plugin) == 1 else plugin[1]  # default as empty string
         }
     config['info']['server'], config['info']['port'] = url.rsplit(':', 1)
-    logging.debug('Shadowsocks sip002 decode release -> %s', config)
+    logger.debug('Shadowsocks sip002 decode release -> %s', config)
     return config
diff --git a/Utils/Logger.py b/Utils/Logger.py
new file mode 100644
index 0000000..6a4f93f
--- /dev/null
+++ b/Utils/Logger.py
@@ -0,0 +1,48 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import sys
+import logging
+import colorlog
+from Basis.Constant import LogLevel, LogFile
+
+logColor = {  # log color
+    'DEBUG': 'white',
+    'INFO': 'green',
+    'WARNING': 'yellow',
+    'ERROR': 'red',
+    'CRITICAL': 'bold_red',
+}
+
+logLevel = {  # log level
+    'debug': logging.DEBUG,
+    'info': logging.INFO,
+    'warning': logging.WARNING,
+    'error': logging.ERROR,
+    'critical': logging.CRITICAL
+}[LogLevel.lower()]
+
+dateFormat = '%Y-%m-%d %H:%M:%S'
+logFormat = '[%(asctime)s.%(msecs)03d] [%(levelname)s] %(message)s (%(module)s.%(funcName)s)'
+
+# load fileHandler -> log file
+fileHandler = logging.FileHandler(LogFile, encoding = 'utf-8')
+fileHandler.setFormatter(logging.Formatter(
+    logFormat, datefmt = dateFormat
+))
+fileHandler.setLevel(logging.DEBUG)  # debug level for log file
+
+# load stdHandler -> stderr
+stdHandler = colorlog.StreamHandler()
+stdHandler.setFormatter(colorlog.ColoredFormatter(
+    '%(log_color)s' + logFormat,
+    datefmt = dateFormat,
+    log_colors = logColor,
+    stream = sys.stderr
+))
+stdHandler.setLevel(LogLevel)  # custom level for stderr
+
+logger = logging.getLogger()
+logger.addHandler(stdHandler)
+logger.addHandler(fileHandler)
+logger.setLevel(logging.DEBUG)  # set log level in handler
diff --git a/log.py b/log.py
new file mode 100755
index 0000000..88ff870
--- /dev/null
+++ b/log.py
@@ -0,0 +1,10 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+from Utils.Logger import logger
+
+logger.debug('debug')
+logger.info('info')
+logger.warning('warning')
+logger.error('error')
+logger.critical('critical')