diff --git a/speechserving/speechserving/bin/main.py b/speechserving/speechserving/bin/main.py
index c5167dd4..97043fd7 100644
--- a/speechserving/speechserving/bin/main.py
+++ b/speechserving/speechserving/bin/main.py
@@ -11,33 +11,3 @@
 # 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 argparse
-
-
-def init(args):
-    """ 系统初始化
-    """
-
-
-def main(args):
-    """主程序入口"""
-
-    if init(args):
-        app.run(host='0.0.0.0', port=conf.port)
-
-
-if __name__ == "__main__":
-    parser = argparse.ArgumentParser()
-    parser.add_argument(
-        "--config_file",
-        action="store",
-        help="yaml file of the app",
-        default="./conf/application.yaml")
-    parser.add_argument(
-        "--log_file",
-        action="store",
-        help="log file",
-        default="./log/paddlespeech.log")
-    args = parser.parse_args()
-
-    main(args)
diff --git a/speechserving/speechserving/bin/paddlespeech-client.py b/speechserving/speechserving/bin/paddlespeech-client.py
index c5167dd4..97043fd7 100644
--- a/speechserving/speechserving/bin/paddlespeech-client.py
+++ b/speechserving/speechserving/bin/paddlespeech-client.py
@@ -11,33 +11,3 @@
 # 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 argparse
-
-
-def init(args):
-    """ 系统初始化
-    """
-
-
-def main(args):
-    """主程序入口"""
-
-    if init(args):
-        app.run(host='0.0.0.0', port=conf.port)
-
-
-if __name__ == "__main__":
-    parser = argparse.ArgumentParser()
-    parser.add_argument(
-        "--config_file",
-        action="store",
-        help="yaml file of the app",
-        default="./conf/application.yaml")
-    parser.add_argument(
-        "--log_file",
-        action="store",
-        help="log file",
-        default="./log/paddlespeech.log")
-    args = parser.parse_args()
-
-    main(args)
diff --git a/speechserving/speechserving/bin/paddlespeech-server.py b/speechserving/speechserving/bin/paddlespeech-server.py
index c5167dd4..97043fd7 100644
--- a/speechserving/speechserving/bin/paddlespeech-server.py
+++ b/speechserving/speechserving/bin/paddlespeech-server.py
@@ -11,33 +11,3 @@
 # 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 argparse
-
-
-def init(args):
-    """ 系统初始化
-    """
-
-
-def main(args):
-    """主程序入口"""
-
-    if init(args):
-        app.run(host='0.0.0.0', port=conf.port)
-
-
-if __name__ == "__main__":
-    parser = argparse.ArgumentParser()
-    parser.add_argument(
-        "--config_file",
-        action="store",
-        help="yaml file of the app",
-        default="./conf/application.yaml")
-    parser.add_argument(
-        "--log_file",
-        action="store",
-        help="log file",
-        default="./log/paddlespeech.log")
-    args = parser.parse_args()
-
-    main(args)
diff --git a/speechserving/speechserving/conf/application.yaml b/speechserving/speechserving/conf/application.yaml
index 358a76dc..29b40b15 100644
--- a/speechserving/speechserving/conf/application.yaml
+++ b/speechserving/speechserving/conf/application.yaml
@@ -6,3 +6,9 @@
 host: '0.0.0.0'
 port: 8090
 
+##################################################################
+#                     CONFIG FILE                                #
+##################################################################
+# add engine type (Options: asr, tts) and config file here.
+engine_backend:
+    asr: 'conf/asr/asr.yaml'
\ No newline at end of file
diff --git a/speechserving/speechserving/conf/asr/asr.yaml b/speechserving/speechserving/conf/asr/asr.yaml
index e69de29b..87405155 100644
--- a/speechserving/speechserving/conf/asr/asr.yaml
+++ b/speechserving/speechserving/conf/asr/asr.yaml
@@ -0,0 +1,5 @@
+model: 'conformer_wenetspeech'
+lang: 'conformer_wenetspeech'
+lang: 'zh'
+sample_rate: 16000
+decode_method: 'attention_rescoring'
diff --git a/speechserving/speechserving/engine/asr/python/asr_engine.py b/speechserving/speechserving/engine/asr/python/asr_engine.py
index 6bd8b616..8dbc7a3e 100644
--- a/speechserving/speechserving/engine/asr/python/asr_engine.py
+++ b/speechserving/speechserving/engine/asr/python/asr_engine.py
@@ -14,18 +14,21 @@
 from engine.base_engine import BaseEngine
 
 from utils.log import logger
+from utils.config import get_config
 
 __all__ = ['ASREngine']
 
 
 class ASREngine(BaseEngine):
-    def __init__(self, name=None):
+    def __init__(self):
         super(ASREngine, self).__init__()
-        self.executor = name
+
+    def init(self, config_file: str):
+        self.config_file = config_file
+        self.executor = None
         self.input = None
         self.output = None
-
-    def init(self):
+        config = get_config(self.config_file)
         pass
 
     def postprocess(self):
@@ -34,12 +37,3 @@ class ASREngine(BaseEngine):
     def run(self):
         logger.info("start run asr engine")
         return "hello world"
-
-
-if __name__ == "__main__":
-    # test Singleton 
-    class1 = ASREngine("ASREngine")
-    class2 = ASREngine()
-    print(class1 is class2)
-    print(id(class1))
-    print(id(class2))
diff --git a/speechserving/speechserving/engine/engine_factory.py b/speechserving/speechserving/engine/engine_factory.py
new file mode 100644
index 00000000..336a9a6f
--- /dev/null
+++ b/speechserving/speechserving/engine/engine_factory.py
@@ -0,0 +1,26 @@
+# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+#
+# 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.
+from engine.asr.python.asr_engine import ASREngine
+from engine.tts.python.tts_engine import TTSEngine
+
+
+class EngineFactory(object):
+    @staticmethod
+    def get_engine(engine_name):
+        if engine_name == 'asr':
+            return ASREngine()
+        elif engine_name == 'tts':
+            return TTSEngine()
+        else:
+            return None
diff --git a/speechserving/speechserving/main.py b/speechserving/speechserving/main.py
index d3e6edc1..3b367418 100644
--- a/speechserving/speechserving/main.py
+++ b/speechserving/speechserving/main.py
@@ -12,43 +12,42 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import argparse
-
 import uvicorn
 import yaml
-
-from engine.tts.python.tts_engine import TTSEngine
 from fastapi import FastAPI
-from restful.api import router as api_router
 
-from paddlespeech.cli.log import logger
+from restful.api import setup_router
+from utils.log import logger
+from utils.config import get_config
+from engine.engine_factory import EngineFactory
 
 app = FastAPI(
     title="PaddleSpeech Serving API", description="Api", version="0.0.1")
 
 
-def init(args):
-    """ 系统初始化
+def init(config):
+    """ system initialization
     """
+    # init api
+    api_list = list(config.engine_backend)
+    api_router = setup_router(api_list)
     app.include_router(api_router)
 
-    # engine single 
-
-    TTS_ENGINE = TTSEngine()
-
-    # todo others 
+    # init engine
+    engine_list = []
+    for engine in config.engine_backend:
+        engine_list.append(EngineFactory.get_engine(engine_name=engine))
+        engine_list[-1].init(config_file=config.engine_backend[engine])
 
     return True
 
 
 def main(args):
-    """主程序入口"""
+    """main function"""
 
-    #TODO configuration 
-    from yacs.config import CfgNode
-    with open(args.config_file, 'rt') as f:
-        config = CfgNode(yaml.safe_load(f))
+    config = get_config(args.config_file)
 
-    if init(args):
+    if init(config):
         uvicorn.run(app, host=config.host, port=config.port, debug=True)
 
 
@@ -58,7 +57,7 @@ if __name__ == "__main__":
         "--config_file",
         action="store",
         help="yaml file of the app",
-        default="./conf/tts/tts.yaml")
+        default="./conf/application.yaml")
 
     parser.add_argument(
         "--log_file",
diff --git a/speechserving/speechserving/restful/api.py b/speechserving/speechserving/restful/api.py
index c6250ce7..b3b87ea5 100644
--- a/speechserving/speechserving/restful/api.py
+++ b/speechserving/speechserving/restful/api.py
@@ -14,8 +14,19 @@
 from fastapi import APIRouter
 
 from .tts_api import router as tts_router
-#from .asr_api import router as asr_router
+from .asr_api import router as asr_router
+
+_router = APIRouter()
+
+def setup_router(api_list: list):
+
+    for api_name in api_list:
+        if api_name == 'asr':
+            _router.include_router(asr_router)
+        elif api_name == 'tts':
+            _router.include_router(tts_router)
+        else:
+            pass
+
+    return _router
 
-router = APIRouter()
-#router.include_router(asr_router)
-router.include_router(tts_router)
diff --git a/speechserving/speechserving/restful/asr_api.py b/speechserving/speechserving/restful/asr_api.py
index eb335e09..9d97b380 100644
--- a/speechserving/speechserving/restful/asr_api.py
+++ b/speechserving/speechserving/restful/asr_api.py
@@ -14,13 +14,12 @@
 from fastapi import APIRouter
 import base64
 
-
 from engine.asr.python.asr_engine import ASREngine
 from .response import ASRResponse
 from .request import ASRRequest
 
-router = APIRouter()
 
+router = APIRouter()
 
 @router.get('/paddlespeech/asr/help')
 def help():
@@ -44,8 +43,8 @@ def asr(request_body: ASRRequest):
     """
     # single 
     asr_engine = ASREngine()
+    print("asr_engine id :" ,id(asr_engine))
 
-    asr_engine.init()
     asr_results = asr_engine.run()
     asr_engine.postprocess()
 
diff --git a/speechserving/speechserving/utils/config.py b/speechserving/speechserving/utils/config.py
new file mode 100644
index 00000000..513c16f6
--- /dev/null
+++ b/speechserving/speechserving/utils/config.py
@@ -0,0 +1,30 @@
+# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# 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 yaml
+from yacs.config import CfgNode
+
+
+def get_config(config_file):
+    """[summary]
+
+    Args:
+        config_file (str): config_file
+
+    Returns:
+        CfgNode: 
+    """
+    with open(config_file, 'rt') as f:
+        config = CfgNode(yaml.safe_load(f))
+
+    return config
diff --git a/speechserving/speechserving/utils/util.py b/speechserving/speechserving/utils/util.py
new file mode 100644
index 00000000..6e1bd26c
--- /dev/null
+++ b/speechserving/speechserving/utils/util.py
@@ -0,0 +1,35 @@
+# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+#
+# 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 
+import base64
+
+
+def readwav2base64(wav_file):
+    """
+    read wave file and covert to base64 string
+    """
+    with open(wav_file, 'rb') as f:
+        base64_bytes = base64.b64encode(f.read())
+        base64_string = base64_bytes.decode('utf-8')
+    return base64_string
+
+
+def readbase64towav(base64_string):
+    pass
+
+
+
+
+def self_check():
+    """ self check resource
+    """
+    return True