diff --git a/requirements.txt b/requirements.txt
index be3368ad..fc4f382f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+overrides
 flake8
 mypy
 mypy_extensions
diff --git a/src/wechaty/accessory.py b/src/wechaty/accessory.py
new file mode 100644
index 00000000..a9b1ebde
--- /dev/null
+++ b/src/wechaty/accessory.py
@@ -0,0 +1,83 @@
+"""
+docstring
+"""
+from abc import ABCMeta
+from typing import Optional
+from wechaty_puppet.puppet import Puppet
+from .config import LOG
+from .wechaty import Wechaty
+
+
+class Accessory:
+    """
+    docstring
+    """
+    __metaclass__ = ABCMeta
+    _puppet: Optional[Puppet] = None
+    # static _wechaty property to doing ...
+    _wechaty: Optional[Wechaty] = None
+    _counter: int = 0
+
+    def __init__(self, name: str = "accessory"):
+        """
+        initialize the accessory instance
+        """
+        self.name: str = name
+        # increase when Accessory is initialized
+        self._counter += 1
+
+    def __str__(self) -> str:
+        """
+        docstring
+        :return: the base accessory class name
+        """
+        return "Accessory instance : %s" % self.name
+
+    @classmethod
+    def puppet(cls, value: Optional[Puppet] = None) -> Optional[Puppet]:
+        """
+        get/set global single instance of the puppet
+        :return:
+        """
+        if value is None:
+            if cls._puppet is None:
+                raise AttributeError("static puppet instance not found ...")
+            LOG.info("get puppet instance %s ...",
+                     cls._puppet.name)
+            return cls._puppet
+
+        if cls._puppet is not None:
+            raise AttributeError("can't set puppet instance %s twice" %
+                                 cls._puppet.name)
+        LOG.info("set puppet instance %s ...",
+                 value.name)
+        cls._puppet = value
+        return None
+
+    @classmethod
+    def wechaty(cls, value: Optional[Wechaty] = None) -> Optional[Wechaty]:
+        """
+        get/set wechaty instance
+
+        If the param of value is None, then the function will return the
+        instance of wechaty.Otherwise, the function will check the type
+        of the value, and set as wechaty instance
+        :param value:
+        :return:
+        """
+        if value is None:
+            if cls._wechaty is None:
+                raise AttributeError("wechaty instance not found")
+            LOG.info("get wechaty instance %s",
+                     cls._wechaty.name)
+            return cls._wechaty
+        if not isinstance(value, Wechaty):
+            raise NameError(
+                "expected wechaty instance type is Wechaty, "
+                "but got %s" % value.__class__
+            )
+        if cls._wechaty is not None:
+            raise AttributeError("can't set wechaty instance %s twice" %
+                                 cls._wechaty.name)
+        cls._wechaty = value
+        return None
diff --git a/src/wechaty/config.py b/src/wechaty/config.py
index 3fcf1fb0..2e489437 100644
--- a/src/wechaty/config.py
+++ b/src/wechaty/config.py
@@ -1,15 +1,30 @@
-'''
-config module
-'''
+"""
+ *
+ *   Wechaty - https://github.com/wechaty/python-wechaty
+ *
+ *   @copyright wechaty
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ *
+ *
+ """
 import logging
 import os
+import re
+from typing import Optional
+from wechaty_puppet.file_box import FileBox
 
-logging.basicConfig(
-    filename="logging.log",
-    level=logging.DEBUG,
-)
-
-log = logging.getLogger('Wechaty')
+LOG = logging.getLogger(__name__)
 
 # log.debug('test logging debug')
 # log.info('test logging info')
@@ -21,3 +36,91 @@
         '../data',
     ),
 )
+
+
+def global_exception_handler(e: Exception) -> None:
+    """
+    handle the global exception
+    :param e: exception message
+    :return:
+    """
+    LOG.error("occur %s %s", e.__class__.__name__, str(e.args))
+    print(e)
+
+
+class DefaultSetting(dict):
+    """
+    store global default setting
+    """
+    default_api_host: Optional[str] = None
+    default_port: Optional[int] = None
+    default_protocol: Optional[str] = None
+
+
+# pylint: disable=R0903
+def valid_api_host(api_host: str) -> bool:
+    """
+    test the validation of the api_host
+    :param api_host:
+    :return:
+    """
+    pattern = re.compile(
+        r'^(([a-zA-Z]{1})|([a-zA-Z]{1}[a-zA-Z]{1})|:?[0-9]*'
+        r'([a-zA-Z]{1}[0-9]{1})|([0-9]{1}[a-zA-Z]{1})|:?[0-9]*'
+        r'([a-zA-Z0-9][-_.a-zA-Z0-9]{0,61}[a-zA-Z0-9]))\.:?[0-9]*'
+        r'([a-zA-Z]{2,13}|[a-zA-Z0-9-]{2,30}.[a-zA-Z]{2,3}):?[0-9]*$'
+    )
+    return bool(pattern.match(api_host))
+
+
+class Config:
+    """
+    store python-wechaty configuration
+    """
+    def __init__(self,
+                 api_host: Optional[str] = None,
+                 token: Optional[str] = None,
+                 protocol: Optional[str] = None,
+                 http_port: Optional[int] = None,
+                 name: str = "python-wechaty",
+                 debug: bool = True,
+                 docker: bool = False):
+        """
+        initialize the configuration
+        """
+        self.default = DefaultSetting
+
+        self.api_host = api_host if api_host is not None \
+            else DefaultSetting.default_api_host
+
+        self.http_port = http_port if http_port is not None \
+            else DefaultSetting.default_port
+
+        self.protocol = protocol if protocol is not None \
+            else DefaultSetting.default_protocol
+
+        if token is None:
+            raise AttributeError("token can't be None")
+
+        self.name = name
+        self.debug = debug
+        self.docker = docker
+
+        if self.api_host is not None and not valid_api_host(self.api_host):
+            raise AttributeError("api host %s is not valid" % self.api_host)
+
+
+# export const CHATIE_OFFICIAL_ACCOUNT_ID = 'gh_051c89260e5d'
+chatie_official_account_id = "gh_051c89260e5d"
+
+
+def qr_code_for_chatie() -> FileBox:
+    """
+    create QRcode for chatie
+    :return:
+    """
+    # const CHATIE_OFFICIAL_ACCOUNT_QRCODE =
+    # 'http://weixin.qq.com/r/qymXj7DEO_1ErfTs93y5'
+    chatie_official_account_qr_code: str = \
+        'http://weixin.qq.com/r/qymXj7DEO_1ErfTs93y5'
+    return FileBox.from_qr_code(chatie_official_account_qr_code)
diff --git a/src/wechaty/config_test.py b/src/wechaty/config_test.py
index 41be37b0..11f885a1 100644
--- a/src/wechaty/config_test.py
+++ b/src/wechaty/config_test.py
@@ -1,6 +1,6 @@
-'''
+"""
 config unit test
-'''
+"""
 from typing import (
     Any,
     # Dict,
@@ -9,7 +9,7 @@
 import pytest   # type: ignore
 
 from .config import (
-    log,
+    LOG,
 )
 
 # pylint: disable=redefined-outer-name
@@ -25,14 +25,14 @@ def fixture_data() -> Iterable[str]:
 def test_config(
         data: Any,
 ) -> None:
-    '''
+    """
     Unit Test for config function
-    '''
+    """
     print(data)
 
     assert data == 'test', 'data should equals test'
 
 
 def test_log():
-    '''test'''
-    assert log, 'log should exist'
+    """test"""
+    assert LOG, 'log should exist'
diff --git a/src/wechaty/images.py b/src/wechaty/images.py
new file mode 100644
index 00000000..68d81fc6
--- /dev/null
+++ b/src/wechaty/images.py
@@ -0,0 +1,88 @@
+"""
+docstring
+"""
+from enum import IntEnum
+from typing import Type, TypeVar
+from wechaty_puppet.file_box import FileBox
+from .accessory import Accessory
+from .config import LOG
+
+
+class ImageType(IntEnum):
+    """
+    docstring ...
+    """
+    Thumbnail = 0
+    HD = 1
+    Artwork = 2
+
+
+T = TypeVar("T", bound="Image")
+
+
+class Image(Accessory):
+    """
+    docstring ...
+    """
+
+    def __str__(self):
+        return "image instance : %d" % self.image_id
+
+    def __init__(self, image_id: str) -> None:
+        """
+        :param image_id:
+        """
+        super(Image, self).__init__()
+        self.image_id = image_id
+        LOG.info("create image : %d", self.image_id)
+        if self.puppet is None:
+            raise NotImplementedError("Image class can not be instanced"
+                                      " without a puppet!")
+
+    @classmethod
+    def create(cls: Type[T], image_id: str) -> T:
+        """
+        create image instance by image_id
+        :param cls:
+        :param image_id:
+        :return:
+        """
+        LOG.info("create static image : %d", image_id)
+        return cls(image_id)
+
+    async def thumbnail(self) -> FileBox:
+        """
+        docstring
+        :return:
+        """
+        LOG.info("image thumbnail for %d", self.image_id)
+        puppet = self.puppet()
+        if puppet is None:
+            raise AttributeError
+        file_box = await puppet.message_image(self.image_id,
+                                              ImageType.Thumbnail)
+        return file_box
+
+    async def hd(self) -> FileBox:
+        """
+        docstring
+        :return:
+        """
+        LOG.info("image hd for %d", self.image_id)
+        puppet = self.puppet()
+        if puppet is None:
+            raise AttributeError
+        file_box = await puppet.message_image(self.image_id, ImageType.HD)
+        return file_box
+
+    async def artwork(self) -> FileBox:
+        """
+        docstring
+        :return:
+        """
+        LOG.info("image artwork for %d", self.image_id)
+        puppet = self.puppet()
+        if puppet is None:
+            raise AttributeError
+        file_box = await puppet.message_image(self.image_id, ImageType.Artwork)
+        return file_box
diff --git a/src/wechaty/user/__init__.py b/src/wechaty/user/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/src/wechaty/user/contact.py b/src/wechaty/user/contact.py
new file mode 100644
index 00000000..e69de29b
diff --git a/src/wechaty/user/room.py b/src/wechaty/user/room.py
new file mode 100644
index 00000000..c2dbfacb
--- /dev/null
+++ b/src/wechaty/user/room.py
@@ -0,0 +1,5 @@
+"""
+python-implementation for room
+"""
+from threading import Event, Thread
+from src.wechaty.accessory import Accessory
diff --git a/src/wechaty/wechaty.py b/src/wechaty/wechaty.py
new file mode 100644
index 00000000..96fd8a4a
--- /dev/null
+++ b/src/wechaty/wechaty.py
@@ -0,0 +1,46 @@
+"""
+wechaty instance
+"""
+from typing import Optional
+from .config import LOG
+
+
+# pylint: disable=R0903
+class WechatyOptions:
+    """
+    WechatyOptions instance
+    """
+    def __init__(self):
+        """
+        WechatyOptions constructor
+        """
+        self.io_token: str = None
+        self.name: str = None
+        self.profile: Optional[None or str] = None
+
+
+# pylint: disable=R0903
+class Wechaty:
+    """
+    docstring
+    """
+    def __init__(self, name: str = "wechaty"):
+        """
+        docstring
+        """
+        self.name = name
+
+    _global_instance: Optional["Wechaty"] = None
+
+    async def start(self) -> None:
+        """
+        start the wechaty
+        :return:
+        """
+        LOG.info("wechaty is starting ...")
+
+    async def stop(self) -> None:
+        """
+        stop the wechaty
+        """
+        LOG.info("wechaty is stoping ...")
diff --git a/wechaty_puppet/__init__.py b/wechaty_puppet/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/wechaty_puppet/file_box.py b/wechaty_puppet/file_box.py
new file mode 100644
index 00000000..ace40c46
--- /dev/null
+++ b/wechaty_puppet/file_box.py
@@ -0,0 +1,36 @@
+"""
+docstring
+"""
+from typing import Type, TypeVar
+
+T = TypeVar("T")
+
+
+# dummy class
+class FileBox:
+    """
+    maintain the file content, which is sended by wechat
+    """
+
+    def to_json(self) -> dict:
+        """
+        dump the file content to json object
+        :return:
+        """
+        raise NotImplementedError
+
+    def to_file(self, file_path: str) -> None:
+        """
+        save the content to the file
+        :return:
+        """
+        raise NotImplementedError
+
+    @classmethod
+    def from_qr_code(cls: Type[T], code:str) -> "FileBox":
+        """
+        create filebox from qrcode
+        :param code:
+        :return:
+        """
+        raise NotImplementedError
diff --git a/wechaty_puppet/puppet.py b/wechaty_puppet/puppet.py
new file mode 100644
index 00000000..dfefbec1
--- /dev/null
+++ b/wechaty_puppet/puppet.py
@@ -0,0 +1,32 @@
+"""
+interface for puppet
+"""
+from enum import Enum
+# from typing import Awaitable
+from .file_box import FileBox
+
+class Puppet:
+    """
+    puppet interface class
+    """
+
+    def __init__(self):
+        self.name: str = "puppet"
+
+    # pylint: disable=R0201
+    async def message_image(self, message_id: str, image_type: Enum) -> FileBox:
+        """
+        docstring
+        :param message_id:
+        :param image_type:
+        :return:
+        """
+        raise NotImplementedError
+
+    def start(self) -> None:
+        """
+        start the puppet
+        :return:
+        """
+        raise NotImplementedError
+