diff --git a/paddleslim/analysis/sensitive.py b/paddleslim/analysis/sensitive.py
index 498de1d6022eb628d99ecccf847758c3b5aea3ab..7fbfde15647df5f5b4e7dd00d922003edafaaf6f 100644
--- a/paddleslim/analysis/sensitive.py
+++ b/paddleslim/analysis/sensitive.py
@@ -12,8 +12,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import logging
 import numpy as np
 from ..core import GraphWrapper
+from ..common import get_logger
+
+_logger = get_logger(__name__, level=logging.INFO)
 
 __all__ = ["sensitivity"]
 
diff --git a/paddleslim/common/__init__.py b/paddleslim/common/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..98b314ab6d144924bff6b68e3fb176ce73583f5c
--- /dev/null
+++ b/paddleslim/common/__init__.py
@@ -0,0 +1,32 @@
+# Copyright (c) 2019  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 controller
+from controller import *
+import sa_controller
+from sa_controller import *
+import log_helper
+from log_helper import *
+import controller_server
+from controller_server import *
+import controller_client
+from controller_client import *
+import lock_utils
+from lock_utils import *
+
+__all__ = []
+__all__ += controller.__all__
+__all__ += sa_controller.__all__
+__all__ += controller_server.__all__
+__all__ += controller_client.__all__
+__all__ += lock_utils.__all__
diff --git a/paddleslim/common/controller.py b/paddleslim/common/controller.py
new file mode 100644
index 0000000000000000000000000000000000000000..8c30f49c3aec27a326417554bac3163789342ff6
--- /dev/null
+++ b/paddleslim/common/controller.py
@@ -0,0 +1,51 @@
+#   Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
+#
+# 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.
+"""The controller used to search hyperparameters or neural architecture"""
+
+import copy
+import math
+import numpy as np
+
+__all__ = ['EvolutionaryController']
+
+
+class EvolutionaryController(object):
+    """Abstract controller for all evolutionary searching method.
+    """
+
+    def __init__(self, *args, **kwargs):
+        pass
+
+    def update(self, tokens, reward):
+        """Update the status of controller according current tokens and reward.
+        Args:
+            tokens(list<int>): A solution of searching task.
+            reward(list<int>): The reward of tokens.
+        """
+        raise NotImplementedError('Abstract method.')
+
+    def reset(self, range_table, constrain_func=None):
+        """Reset the controller.
+        Args:
+            range_table(list<int>): It is used to define the searching space of controller.
+                                    The tokens[i] generated by controller should be in [0, range_table[i]).
+            constrain_func(function): It is used to check whether tokens meet the constraint.
+                                     None means there is no constraint. Default: None.
+        """
+        raise NotImplementedError('Abstract method.')
+
+    def next_tokens(self):
+        """Generate new tokens.
+        """
+        raise NotImplementedError('Abstract method.')
diff --git a/paddleslim/common/controller_client.py b/paddleslim/common/controller_client.py
new file mode 100644
index 0000000000000000000000000000000000000000..5dcbd7bb64bf4460371d523a0f745e2490a7b3a0
--- /dev/null
+++ b/paddleslim/common/controller_client.py
@@ -0,0 +1,66 @@
+# Copyright (c) 2019 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 logging
+import socket
+from log_helper import get_logger
+
+__all__ = ['ControllerClient']
+
+_logger = get_logger(__name__, level=logging.INFO)
+
+
+class ControllerClient(object):
+    """
+    Controller client.
+    """
+
+    def __init__(self, server_ip=None, server_port=None, key=None):
+        """
+        Args:
+            server_ip(str): The ip that controller server listens on. None means getting the ip automatically. Default: None.
+            server_port(int): The port that controller server listens on. 0 means getting usable port automatically. Default: 0.
+            key(str): The key used to identify legal agent for controller server. Default: "light-nas"
+        """
+        self.server_ip = server_ip
+        self.server_port = server_port
+        self.socket_client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        self._key = key
+
+    def update(self, tokens, reward):
+        """
+        Update the controller according to latest tokens and reward.
+        Args:
+            tokens(list<int>): The tokens generated in last step.
+            reward(float): The reward of tokens.
+        """
+        socket_client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        socket_client.connect((self.server_ip, self.server_port))
+        tokens = ",".join([str(token) for token in tokens])
+        socket_client.send("{}\t{}\t{}".format(self._key, tokens, reward)
+                           .encode())
+        tokens = socket_client.recv(1024).decode()
+        tokens = [int(token) for token in tokens.strip("\n").split(",")]
+        return tokens
+
+    def next_tokens(self):
+        """
+        Get next tokens.
+        """
+        socket_client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        socket_client.connect((self.server_ip, self.server_port))
+        socket_client.send("next_tokens".encode())
+        tokens = socket_client.recv(1024).decode()
+        tokens = [int(token) for token in tokens.strip("\n").split(",")]
+        return tokens
diff --git a/paddleslim/common/controller_server.py b/paddleslim/common/controller_server.py
new file mode 100644
index 0000000000000000000000000000000000000000..10883d5988652a8c3f738416eae3dd768ba74e67
--- /dev/null
+++ b/paddleslim/common/controller_server.py
@@ -0,0 +1,128 @@
+# Copyright (c) 2019 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 os
+import logging
+import socket
+from .log_helper import get_logger
+from threading import Thread
+from .lock import lock, unlock
+
+__all__ = ['ControllerServer']
+
+_logger = get_logger(__name__, level=logging.INFO)
+
+
+class ControllerServer(object):
+    """
+    The controller wrapper with a socket server to handle the request of search agent.
+    """
+
+    def __init__(self,
+                 controller=None,
+                 address=('', 0),
+                 max_client_num=100,
+                 search_steps=None,
+                 key=None):
+        """
+        Args:
+            controller(slim.searcher.Controller): The controller used to generate tokens.
+            address(tuple): The address of current server binding with format (ip, port). Default: ('', 0).
+                            which means setting ip automatically
+            max_client_num(int): The maximum number of clients connecting to current server simultaneously. Default: 100.
+            search_steps(int): The total steps of searching. None means never stopping. Default: None 
+        """
+        self._controller = controller
+        self._address = address
+        self._max_client_num = max_client_num
+        self._search_steps = search_steps
+        self._closed = False
+        self._port = address[1]
+        self._ip = address[0]
+        self._key = key
+        self._socket_file = "./controller_server.socket"
+
+    def start(self):
+        open(self._socket_file, 'a').close()
+        socket_file = open(self._socket_file, 'r+')
+        lock(socket_file)
+        tid = socket_file.readline()
+        if tid == '':
+            _logger.info("start controller server...")
+            tid = self._start()
+            socket_file.write("tid: {}\nip: {}\nport: {}\n".format(
+                tid, self._ip, self._port))
+            _logger.info("started controller server...")
+        unlock(socket_file)
+        socket_file.close()
+
+    def _start(self):
+        self._socket_server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        self._socket_server.bind(self._address)
+        self._socket_server.listen(self._max_client_num)
+        self._port = self._socket_server.getsockname()[1]
+        self._ip = self._socket_server.getsockname()[0]
+        _logger.info("ControllerServer - listen on: [{}:{}]".format(
+            self._ip, self._port))
+        thread = Thread(target=self.run)
+        thread.start()
+        return str(thread)
+
+    def close(self):
+        """Close the server."""
+        self._closed = True
+        os.remove(self._socket_file)
+        _logger.info("server closed!")
+
+    def port(self):
+        """Get the port."""
+        return self._port
+
+    def ip(self):
+        """Get the ip."""
+        return self._ip
+
+    def run(self):
+        _logger.info("Controller Server run...")
+        try:
+            while ((self._search_steps is None) or
+                   (self._controller._iter <
+                    (self._search_steps))) and not self._closed:
+                conn, addr = self._socket_server.accept()
+                message = conn.recv(1024).decode()
+                if message.strip("\n") == "next_tokens":
+                    tokens = self._controller.next_tokens()
+                    tokens = ",".join([str(token) for token in tokens])
+                    conn.send(tokens.encode())
+                else:
+                    _logger.debug("recv message from {}: [{}]".format(addr,
+                                                                      message))
+                    messages = message.strip('\n').split("\t")
+                    if (len(messages) < 3) or (messages[0] != self._key):
+                        _logger.debug("recv noise from {}: [{}]".format(
+                            addr, message))
+                        continue
+                    tokens = messages[1]
+                    reward = messages[2]
+                    tokens = [int(token) for token in tokens.split(",")]
+                    self._controller.update(tokens, float(reward))
+                    tokens = self._controller.next_tokens()
+                    tokens = ",".join([str(token) for token in tokens])
+                    conn.send(tokens.encode())
+                    _logger.debug("send message to {}: [{}]".format(addr,
+                                                                    tokens))
+                conn.close()
+        finally:
+            self._socket_server.close()
+            self.close()
diff --git a/paddleslim/common/lock_utils.py b/paddleslim/common/lock_utils.py
new file mode 100644
index 0000000000000000000000000000000000000000..9daf4f3f6e842609a39fd286dfa49eb705c631a7
--- /dev/null
+++ b/paddleslim/common/lock_utils.py
@@ -0,0 +1,38 @@
+# Copyright (c) 2019 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 os
+
+__all__ = ['lock', 'unlock']
+
+if os.name == 'nt':
+
+    def lock(file):
+        raise NotImplementedError('Windows is not supported.')
+
+    def unlock(file):
+        raise NotImplementedError('Windows is not supported.')
+
+elif os.name == 'posix':
+    from fcntl import flock, LOCK_EX, LOCK_UN
+
+    def lock(file):
+        """Lock the file in local file system."""
+        flock(file.fileno(), LOCK_EX)
+
+    def unlock(file):
+        """Unlock the file in local file system."""
+        flock(file.fileno(), LOCK_UN)
+else:
+    raise RuntimeError("File Locker only support NT and Posix platforms!")
diff --git a/paddleslim/common/log_helper.py b/paddleslim/common/log_helper.py
new file mode 100644
index 0000000000000000000000000000000000000000..1088761e0284181bc485f5ee1824e1cbd9c7eb81
--- /dev/null
+++ b/paddleslim/common/log_helper.py
@@ -0,0 +1,48 @@
+#   Copyright (c) 2019 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 __future__ import print_function
+
+import logging
+
+__all__ = ['get_logger']
+
+
+def get_logger(name, level, fmt=None):
+    """
+    Get logger from logging with given name, level and format without
+    setting logging basicConfig. For setting basicConfig in paddle
+    will disable basicConfig setting after import paddle.
+    Args:
+        name (str): The logger name.
+        level (logging.LEVEL): The base level of the logger
+        fmt (str): Format of logger output
+    Returns:
+        logging.Logger: logging logger with given setttings
+    Examples:
+        .. code-block:: python
+            logger = log_helper.get_logger(__name__, logging.INFO,
+                            fmt='%(asctime)s-%(levelname)s: %(message)s')
+    """
+
+    logger = logging.getLogger(name)
+    logger.setLevel(level)
+    handler = logging.StreamHandler()
+
+    if fmt:
+        formatter = logging.Formatter(fmt=fmt)
+        handler.setFormatter(formatter)
+
+    logger.addHandler(handler)
+    return logger
diff --git a/paddleslim/common/sa_controller.py b/paddleslim/common/sa_controller.py
new file mode 100644
index 0000000000000000000000000000000000000000..b619b818a3208d740c1ddb6753cf5931f3d058f5
--- /dev/null
+++ b/paddleslim/common/sa_controller.py
@@ -0,0 +1,113 @@
+#   Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
+#
+# 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.
+"""The controller used to search hyperparameters or neural architecture"""
+
+import copy
+import math
+import logging
+import numpy as np
+from .controller import EvolutionaryController
+from log_helper import get_logger
+
+__all__ = ["SAController"]
+
+_logger = get_logger(__name__, level=logging.INFO)
+
+
+class SAController(EvolutionaryController):
+    """Simulated annealing controller."""
+
+    def __init__(self,
+                 range_table=None,
+                 reduce_rate=0.85,
+                 init_temperature=1024,
+                 max_iter_number=300,
+                 init_tokens=None,
+                 constrain_func=None):
+        """Initialize.
+        Args:
+            range_table(list<int>): Range table.
+            reduce_rate(float): The decay rate of temperature.
+            init_temperature(float): Init temperature.
+            max_iter_number(int): max iteration number.
+            init_tokens(list<int>): The initial tokens.
+            constrain_func(function): The callback function used to check whether the tokens meet constraint. None means there is no constraint. Default: None.
+        """
+        super(SAController, self).__init__()
+        self._range_table = range_table
+        assert isinstance(self._range_table, tuple) and (
+            len(self._range_table) == 2)
+        self._reduce_rate = reduce_rate
+        self._init_temperature = init_temperature
+        self._max_iter_number = max_iter_number
+        self._reward = -1
+        self._tokens = init_tokens
+        self._constrain_func = constrain_func
+        self._max_reward = -1
+        self._best_tokens = None
+        self._iter = 0
+
+    def __getstate__(self):
+        d = {}
+        for key in self.__dict__:
+            if key != "_constrain_func":
+                d[key] = self.__dict__[key]
+        return d
+
+    def update(self, tokens, reward):
+        """
+        Update the controller according to latest tokens and reward.
+        Args:
+            tokens(list<int>): The tokens generated in last step.
+            reward(float): The reward of tokens.
+        """
+        self._iter += 1
+        temperature = self._init_temperature * self._reduce_rate**self._iter
+        if (reward > self._reward) or (np.random.random() <= math.exp(
+            (reward - self._reward) / temperature)):
+            self._reward = reward
+            self._tokens = tokens
+        if reward > self._max_reward:
+            self._max_reward = reward
+            self._best_tokens = tokens
+        _logger.info(
+            "Controller - iter: {}; current_reward: {}; current tokens: {}".
+            format(self._iter, self._reward, self._tokens))
+
+    def next_tokens(self, control_token=None):
+        """
+        Get next tokens.
+        """
+        if control_token:
+            tokens = control_token[:]
+        else:
+            tokens = self._tokens
+        new_tokens = tokens[:]
+        index = int(len(self._range_table[0]) * np.random.random())
+        new_tokens[index] = np.random.randint(self._range_table[0][index],
+                                              self._range_table[1][index] + 1)
+        _logger.debug("change index[{}] from {} to {}".format(index, tokens[
+            index], new_tokens[index]))
+        if self._constrain_func is None:
+            return new_tokens
+        for _ in range(self._max_iter_number):
+            if not self._constrain_func(new_tokens):
+                index = int(len(self._range_table[0]) * np.random.random())
+                new_tokens = tokens[:]
+                new_tokens[index] = np.random.randint(
+                    self._range_table[0][index],
+                    self._range_table[1][index] + 1)
+            else:
+                break
+        return new_tokens
diff --git a/paddleslim/nas/__init__.py b/paddleslim/nas/__init__.py
index 2f5509144f53529ae717b72bbb7252b4b06a0048..f11948f6bcbdd3d52e334bed3b06510e226825bc 100644
--- a/paddleslim/nas/__init__.py
+++ b/paddleslim/nas/__init__.py
@@ -14,6 +14,9 @@
 
 import search_space
 from search_space import *
+import sa_nas
+from sa_nas import *
 
 __all__ = []
 __all__ += search_space.__all__
+__all__ += sa_nas.__all__
diff --git a/paddleslim/nas/sa_nas.py b/paddleslim/nas/sa_nas.py
new file mode 100644
index 0000000000000000000000000000000000000000..cfc747b0ec9f977dc4e41d2fb128b29823cfd3a3
--- /dev/null
+++ b/paddleslim/nas/sa_nas.py
@@ -0,0 +1,145 @@
+# Copyright (c) 2019  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 socket
+import logging
+import numpy as np
+import paddle.fluid as fluid
+from ..core import VarWrapper, OpWrapper, GraphWrapper
+from ..common import SAController
+from ..common import get_logger
+from ..analysis import flops
+
+from ..common import ControllerServer
+from ..common import ControllerClient
+from .search_space import SearchSpaceFactory
+
+__all__ = ["SANAS"]
+
+_logger = get_logger(__name__, level=logging.INFO)
+
+
+class SANAS(object):
+    def __init__(self,
+                 configs,
+                 max_flops=None,
+                 max_latency=None,
+                 server_addr=("", 0),
+                 init_temperature=100,
+                 reduce_rate=0.85,
+                 max_try_number=300,
+                 max_client_num=10,
+                 search_steps=300,
+                 key="sa_nas",
+                 is_server=True):
+        """
+        Search a group of ratios used to prune program.
+        Args:
+            configs(list<tuple>): A list of search space configuration with format (key, input_size, output_size, block_num).
+                                  `key` is the name of search space with data type str. `input_size` and `output_size`  are
+                                   input size and output size of searched sub-network. `block_num` is the number of blocks in searched network.
+            max_flops(int): The max flops of searched network. None means no constrains. Default: None.
+            max_latency(float): The max latency of searched network. None means no constrains. Default: None.
+            server_addr(tuple): A tuple of server ip and server port for controller server. 
+            init_temperature(float): The init temperature used in simulated annealing search strategy.
+            reduce_rate(float): The decay rate used in simulated annealing search strategy.
+            max_try_number(int): The max number of trying to generate legal tokens.
+            max_client_num(int): The max number of connections of controller server.
+            search_steps(int): The steps of searching.
+            key(str): Identity used in communication between controller server and clients.
+            is_server(bool): Whether current host is controller server. Default: True.
+        """
+
+        self._reduce_rate = reduce_rate
+        self._init_temperature = init_temperature
+        self._max_try_number = max_try_number
+        self._is_server = is_server
+        self._max_flops = max_flops
+        self._max_latency = max_latency
+
+        self._configs = configs
+
+        factory = SearchSpaceFactory()
+        self._search_space = factory.get_search_space(configs)
+        init_tokens = self._search_space.init_tokens()
+        range_table = self._search_space.range_table()
+        range_table = (len(range_table) * [0], range_table)
+
+        print range_table
+
+        controller = SAController(range_table, self._reduce_rate,
+                                  self._init_temperature, self._max_try_number,
+                                  init_tokens, self._constrain_func)
+
+        server_ip, server_port = server_addr
+        if server_ip == None or server_ip == "":
+            server_ip = self._get_host_ip()
+
+        self._controller_server = ControllerServer(
+            controller=controller,
+            address=(server_ip, server_port),
+            max_client_num=max_client_num,
+            search_steps=search_steps,
+            key=key)
+
+        # create controller server
+        if self._is_server:
+            self._controller_server.start()
+
+        self._controller_client = ControllerClient(
+            self._controller_server.ip(),
+            self._controller_server.port(),
+            key=key)
+
+        self._iter = 0
+
+    def _get_host_ip(self):
+        return socket.gethostbyname(socket.gethostname())
+
+    def _constrain_func(self, tokens):
+        if (self._max_flops is None) and (self._max_latency is None):
+            return True
+        archs = self._search_space.token2arch(tokens)
+        main_program = fluid.Program()
+        startup_program = fluid.Program()
+        with fluid.program_guard(main_program, startup_program):
+            i = 0
+            for config, arch in zip(self._configs, archs):
+                input_size = config[1]["input_size"]
+                input = fluid.data(
+                    name="data_{}".format(i),
+                    shape=[None, 3, input_size, input_size],
+                    dtype="float32")
+                output = arch(input)
+                i += 1
+        return flops(main_program) < self._max_flops
+
+    def next_archs(self):
+        """
+        Get next network architectures.
+        Returns:
+            list<function>: A list of functions that define networks.
+        """
+        self._current_tokens = self._controller_client.next_tokens()
+        archs = self._search_space.token2arch(self._current_tokens)
+        return archs
+
+    def reward(self, score):
+        """
+        Return reward of current searched network.
+        Args:
+            score(float): The score of current searched network.
+        """
+        self._controller_client.update(self._current_tokens, score)
+        self._iter += 1
diff --git a/paddleslim/nas/search_space/mobilenetv2.py b/paddleslim/nas/search_space/mobilenetv2.py
index 90e0b2a0e704a2f44a8031b05d475419bc534677..28d8a7ea03bc94618b9b5575f837f09879d309c8 100644
--- a/paddleslim/nas/search_space/mobilenetv2.py
+++ b/paddleslim/nas/search_space/mobilenetv2.py
@@ -52,7 +52,6 @@ class MobileNetV2Space(SearchSpaceBase):
         self.scale = scale
         self.class_dim = class_dim
 
-
     def init_tokens(self):
         """
         The initial token send to controller.
@@ -71,10 +70,11 @@ class MobileNetV2Space(SearchSpaceBase):
                 4, 9, 0, 0] # 6, 320, 1
         # yapf: enable
 
-        if self.block_num < 5: 
+        if self.block_num < 5:
             self.token_len = 1 + (self.block_num - 1) * 4
         else:
-            self.token_len = 1 + (self.block_num + 2 * (self.block_num - 5)) * 4 
+            self.token_len = 1 + (self.block_num + 2 *
+                                  (self.block_num - 5)) * 4
 
         return init_token_base[:self.token_len]
 
@@ -92,6 +92,7 @@ class MobileNetV2Space(SearchSpaceBase):
                 5, 10, 6, 2,
                 5, 10, 6, 2,
                 5, 12, 6, 2]
+        range_table_base = list(np.array(range_table_base) - 1)
         # yapf: enable
         return range_table_base[:self.token_len]
 
@@ -107,24 +108,36 @@ class MobileNetV2Space(SearchSpaceBase):
             tokens = self.init_tokens()
 
         bottleneck_params_list = []
-        if self.block_num >= 1: bottleneck_params_list.append((1, self.head_num[tokens[0]], 1, 1, 3)) 
-        if self.block_num >= 2: bottleneck_params_list.append((self.multiply[tokens[1]], self.filter_num1[tokens[2]],
-                                       self.repeat[tokens[3]], 2, self.k_size[tokens[4]])) 
-        if self.block_num >= 3: bottleneck_params_list.append((self.multiply[tokens[5]], self.filter_num1[tokens[6]],
-                                       self.repeat[tokens[7]], 2, self.k_size[tokens[8]])) 
-        if self.block_num >= 4: bottleneck_params_list.append((self.multiply[tokens[9]], self.filter_num2[tokens[10]],
-                                       self.repeat[tokens[11]], 2, self.k_size[tokens[12]])) 
-        if self.block_num >= 5: 
-            bottleneck_params_list.append((self.multiply[tokens[13]], self.filter_num3[tokens[14]],
-                                       self.repeat[tokens[15]], 2, self.k_size[tokens[16]])) 
-            bottleneck_params_list.append((self.multiply[tokens[17]], self.filter_num3[tokens[18]],
-                                       self.repeat[tokens[19]], 1, self.k_size[tokens[20]])) 
-        if self.block_num >= 6: 
-            bottleneck_params_list.append((self.multiply[tokens[21]], self.filter_num5[tokens[22]],
-                                       self.repeat[tokens[23]], 2, self.k_size[tokens[24]]))
-            bottleneck_params_list.append((self.multiply[tokens[25]], self.filter_num6[tokens[26]],
-                                       self.repeat[tokens[27]], 1, self.k_size[tokens[28]])) 
-        
+        if self.block_num >= 1:
+            bottleneck_params_list.append(
+                (1, self.head_num[tokens[0]], 1, 1, 3))
+        if self.block_num >= 2:
+            bottleneck_params_list.append(
+                (self.multiply[tokens[1]], self.filter_num1[tokens[2]],
+                 self.repeat[tokens[3]], 2, self.k_size[tokens[4]]))
+        if self.block_num >= 3:
+            bottleneck_params_list.append(
+                (self.multiply[tokens[5]], self.filter_num1[tokens[6]],
+                 self.repeat[tokens[7]], 2, self.k_size[tokens[8]]))
+        if self.block_num >= 4:
+            bottleneck_params_list.append(
+                (self.multiply[tokens[9]], self.filter_num2[tokens[10]],
+                 self.repeat[tokens[11]], 2, self.k_size[tokens[12]]))
+        if self.block_num >= 5:
+            bottleneck_params_list.append(
+                (self.multiply[tokens[13]], self.filter_num3[tokens[14]],
+                 self.repeat[tokens[15]], 2, self.k_size[tokens[16]]))
+            bottleneck_params_list.append(
+                (self.multiply[tokens[17]], self.filter_num3[tokens[18]],
+                 self.repeat[tokens[19]], 1, self.k_size[tokens[20]]))
+        if self.block_num >= 6:
+            bottleneck_params_list.append(
+                (self.multiply[tokens[21]], self.filter_num5[tokens[22]],
+                 self.repeat[tokens[23]], 2, self.k_size[tokens[24]]))
+            bottleneck_params_list.append(
+                (self.multiply[tokens[25]], self.filter_num6[tokens[26]],
+                 self.repeat[tokens[27]], 1, self.k_size[tokens[28]]))
+
         def net_arch(input):
             #conv1
             # all padding is 'SAME' in the conv2d, can compute the actual padding automatic. 
@@ -182,15 +195,15 @@ class MobileNetV2Space(SearchSpaceBase):
         return fluid.layers.elementwise_add(input, data_residual)
 
     def _inverted_residual_unit(self,
-                               input,
-                               num_in_filter,
-                               num_filters,
-                               ifshortcut,
-                               stride,
-                               filter_size,
-                               expansion_factor,
-                               reduction_ratio=4,
-                               name=None):
+                                input,
+                                num_in_filter,
+                                num_filters,
+                                ifshortcut,
+                                stride,
+                                filter_size,
+                                expansion_factor,
+                                reduction_ratio=4,
+                                name=None):
         """Build inverted residual unit.
         Args:
             input(Variable), input.
diff --git a/paddleslim/nas/search_space/resnet.py b/paddleslim/nas/search_space/resnet.py
index a6ac5817ce89190987d67f1eda644fa2aef79037..7ed404e5e145c9f173aee95823c8d6ac6a47dfdb 100644
--- a/paddleslim/nas/search_space/resnet.py
+++ b/paddleslim/nas/search_space/resnet.py
@@ -25,19 +25,25 @@ from .search_space_registry import SEARCHSPACE
 
 __all__ = ["ResNetSpace"]
 
+
 @SEARCHSPACE.register
 class ResNetSpace(SearchSpaceBase):
-    def __init__(self, input_size, output_size, block_num, scale=1.0, class_dim=1000):
+    def __init__(self,
+                 input_size,
+                 output_size,
+                 block_num,
+                 scale=1.0,
+                 class_dim=1000):
         super(ResNetSpace, self).__init__(input_size, output_size, block_num)
         pass
 
     def init_tokens(self):
-        return [0,0,0,0,0,0]
+        return [0, 0, 0, 0, 0, 0]
 
     def range_table(self):
-        return [3,3,3,3,3,3]
+        return [2, 2, 2, 2, 2, 2]
 
-    def token2arch(self,tokens=None):
+    def token2arch(self, tokens=None):
         if tokens is None:
             self.init_tokens()
 
@@ -54,5 +60,3 @@ class ResNetSpace(SearchSpaceBase):
             return input
 
         return net_arch
-
-
diff --git a/paddleslim/prune/pruner.py b/paddleslim/prune/pruner.py
index 30341f63407aa1b0cc52ec5b43eadead27aec2ab..b653c2b5a0d46b3de58cc5a609dd20dba7363c6a 100644
--- a/paddleslim/prune/pruner.py
+++ b/paddleslim/prune/pruner.py
@@ -14,9 +14,9 @@
 
 import numpy as np
 import paddle.fluid as fluid
-from core import VarWrapper, OpWrapper, GraphWrapper
+from ..core import VarWrapper, OpWrapper, GraphWrapper
 
-__all__ = ["prune"]
+__all__ = ["Pruner"]
 
 
 class Pruner():
diff --git a/paddleslim/quant/__init__.py b/paddleslim/quant/__init__.py
index f97b9f1f28fdf4d812dd37f90b01750d1d475e6a..5f5f9a300630abac32a9c0301328e344da082c55 100644
--- a/paddleslim/quant/__init__.py
+++ b/paddleslim/quant/__init__.py
@@ -12,4 +12,5 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from .quanter import quant_aware, quant_post, convert
 from .quant_embedding import quant_embedding
diff --git a/paddleslim/quant/quanter.py b/paddleslim/quant/quanter.py
new file mode 100644
index 0000000000000000000000000000000000000000..0db22772d712951ed895f2d2e897142d6ce3c377
--- /dev/null
+++ b/paddleslim/quant/quanter.py
@@ -0,0 +1,205 @@
+# Copyright (c) 2019  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 copy
+import paddle
+import paddle.fluid as fluid
+from paddle.fluid.framework import IrGraph
+from paddle.fluid.contrib.slim.quantization import QuantizationTransformPass
+from paddle.fluid.contrib.slim.quantization import QuantizationFreezePass
+from paddle.fluid.contrib.slim.quantization import ConvertToInt8Pass
+from paddle.fluid.contrib.slim.quantization import TransformForMobilePass
+from paddle.fluid import core
+
+WEIGHT_QUANTIZATION_TYPES=['abs_max', 'channel_wise_abs_max', 'range_abs_max', 'moving_average_abs_max']
+ACTIVATION_QUANTIZATION_TYPES=['abs_max','range_abs_max', 'moving_average_abs_max']
+VALID_DTYPES = ['int8']
+
+_quant_config_default = {
+    # weight quantize type, default is 'abs_max'
+    'weight_quantize_type': 'abs_max',
+    # activation quantize type, default is 'abs_max'
+    'activation_quantize_type': 'abs_max',
+    # weight quantize bit num, default is 8
+    'weight_bits': 8,
+    # activation quantize bit num, default is 8
+    'activation_bits': 8,
+    # ops of name_scope in not_quant_pattern list, will not be quantized
+    'not_quant_pattern': ['skip_quant'],
+    # ops of type in quantize_op_types, will be quantized
+    'quantize_op_types': ['conv2d', 'depthwise_conv2d', 'mul'],
+    # data type after quantization, such as 'uint8', 'int8', etc. default is 'int8'
+    'dtype': 'int8',
+    # window size for 'range_abs_max' quantization. defaulf is 10000
+    'window_size': 10000,
+    # The decay coefficient of moving average, default is 0.9
+    'moving_rate': 0.9,
+    # if set quant_weight_only True, then only quantize parameters of layers which need to be quantized,
+    # and activations will not be quantized.
+    'quant_weight_only': False
+}
+
+
+def _parse_configs(user_config):
+    """
+    check user configs is valid, and set default value if user not config.
+    Args:
+        user_config(dict):the config of user.
+    Return:
+        configs(dict): final configs will be used.
+    """
+
+    configs = copy.deepcopy(_quant_config_default)
+    configs.update(user_config)
+
+    # check configs is valid
+    assert configs['weight_quantize_type'] in WEIGHT_QUANTIZATION_TYPES, \
+        "Unknown weight_quantize_type: '%s'. It can only be " + " ".join(WEIGHT_QUANTIZATION_TYPES)
+
+    assert configs['activation_quantize_type'] in ACTIVATION_QUANTIZATION_TYPES, \
+        "Unknown activation_quantize_type: '%s'. It can only be " + " ".join(ACTIVATION_QUANTIZATION_TYPES)
+
+    assert isinstance(configs['weight_bits'], int), \
+        "weight_bits must be int value."
+
+    assert (configs['weight_bits'] >= 1 and configs['weight_bits'] <= 16), \
+        "weight_bits should be between 1 and 16."
+
+    assert isinstance(configs['activation_bits'], int), \
+        "activation_bits must be int value."
+
+    assert (configs['activation_bits'] >= 1 and configs['activation_bits'] <= 16), \
+        "activation_bits should be between 1 and 16."
+
+    assert isinstance(configs['not_quant_pattern'], list), \
+        "not_quant_pattern must be a list"
+
+    assert isinstance(configs['quantize_op_types'], list), \
+        "quantize_op_types must be a list"
+
+    assert isinstance(configs['dtype'], str), \
+        "dtype must be a str."
+
+    assert (configs['dtype'] in VALID_DTYPES), \
+        "dtype can only be " + " ".join(VALID_DTYPES)
+
+    assert isinstance(configs['window_size'], int), \
+        "window_size must be int value, window size for 'range_abs_max' quantization, default is 10000."
+
+    assert isinstance(configs['moving_rate'], float), \
+        "moving_rate must be float value, The decay coefficient of moving average, default is 0.9."
+
+    assert isinstance(configs['quant_weight_only'], bool), \
+        "quant_weight_only must be bool value, if set quant_weight_only True, " \
+        "then only quantize parameters of layers which need to be quantized, " \
+        " and activations will not be quantized."
+
+    return configs
+
+
+def quant_aware(program, place, config, scope=None, for_test=False):
+    """
+    add trainable quantization ops in program.
+    Args:
+        program(fluid.Program): program
+        scope(fluid.Scope): the scope to store var, it's should be the value of program's scope, usually it's fluid.global_scope().
+        place(fluid.CPUPlace or fluid.CUDAPlace): place
+        config(dict): configs for quantization, default values are in quant_config_default dict.
+        for_test: if program is test program, for_test should be set True, else False.
+    Return:
+        fluid.Program: user can finetune this quantization program to enhance the accuracy.
+    """
+
+    scope = fluid.global_scope() if not scope else scope
+    assert isinstance(config, dict), "config must be dict"
+
+    assert 'weight_quantize_type' in config.keys(
+    ), 'weight_quantize_type must be configured'
+    assert 'activation_quantize_type' in config.keys(
+    ), 'activation_quantize_type must be configured'
+
+    config = _parse_configs(config)
+    main_graph = IrGraph(core.Graph(program.desc), for_test=for_test)
+
+    transform_pass = QuantizationTransformPass(
+        scope=scope,
+        place=place,
+        weight_bits=config['weight_bits'],
+        activation_bits=config['activation_bits'],
+        activation_quantize_type=config['activation_quantize_type'],
+        weight_quantize_type=config['weight_quantize_type'],
+        window_size=config['window_size'],
+        moving_rate=config['moving_rate'],
+        quantizable_op_type=config['quantize_op_types'],
+        skip_pattern=config['not_quant_pattern'])
+
+    transform_pass.apply(main_graph)
+
+    if for_test:
+        quant_program = main_graph.to_program()
+    else:
+        quant_program = fluid.CompiledProgram(main_graph.graph)
+    return quant_program
+
+
+def quant_post(program, place, config, scope=None):
+    """
+    add quantization ops in program. the program returned is not trainable.
+    Args:
+        program(fluid.Program): program
+        scope(fluid.Scope): the scope to store var, it's should be the value of program's scope, usually it's fluid.global_scope().
+        place(fluid.CPUPlace or fluid.CUDAPlace): place
+        config(dict): configs for quantization, default values are in quant_config_default dict.
+        for_test: is for test program.
+    Return:
+        fluid.Program: the quantization program is not trainable.
+    """
+    pass
+
+
+def convert(program, scope, place, config, save_int8=False):
+    """
+    add quantization ops in program. the program returned is not trainable.
+    Args:
+        program(fluid.Program): program
+        scope(fluid.Scope): the scope to store var, when is None will use fluid.global_scope()
+        place(fluid.CPUPlace or fluid.CUDAPlace): place
+        config(dict): configs for quantization, default values are in quant_config_default dict.
+        save_int8: is export int8 freezed program.
+    Return:
+        fluid.Program: freezed program which can be used for inference.
+                       parameters is float32 type, but it's value in int8 range.
+        fluid.Program: freezed int8 program which can be used for inference.
+                       if save_int8 is False, this value is None.
+    """
+
+    test_graph = IrGraph(core.Graph(program.desc), for_test=True)
+
+    # Freeze the graph after training by adjusting the quantize
+    # operators' order for the inference.
+    freeze_pass = QuantizationFreezePass(
+        scope=scope,
+        place=place,
+        weight_quantize_type=config['weight_quantize_type'])
+    freeze_pass.apply(test_graph)
+    freezed_program = test_graph.to_program()
+
+    if save_int8:
+        convert_int8_pass = ConvertToInt8Pass(
+            scope=fluid.global_scope(), place=place)
+        convert_int8_pass.apply(test_graph)
+        freezed_program_int8 = test_graph.to_program()
+        return freezed_program, freezed_program_int8
+    else:
+        return freezed_program
diff --git a/tests/test_sa_nas.py b/tests/test_sa_nas.py
new file mode 100644
index 0000000000000000000000000000000000000000..c1bcd08dadf87e24f31af1a525f67aa9a92bd26e
--- /dev/null
+++ b/tests/test_sa_nas.py
@@ -0,0 +1,59 @@
+# Copyright (c) 2019  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 sys
+sys.path.append("../")
+import unittest
+import paddle.fluid as fluid
+from paddleslim.nas import SANAS
+from paddleslim.nas import SearchSpaceFactory
+from paddleslim.analysis import flops
+
+
+class TestSANAS(unittest.TestCase):
+    def test_nas(self):
+
+        factory = SearchSpaceFactory()
+        config0 = {'input_size': 224, 'output_size': 7, 'block_num': 5}
+        config1 = {'input_size': 7, 'output_size': 1, 'block_num': 2}
+        configs = [('MobileNetV2Space', config0), ('ResNetSpace', config1)]
+
+        space = factory.get_search_space([('MobileNetV2Space', config0)])
+        origin_arch = space.token2arch()[0]
+
+        main_program = fluid.Program()
+        s_program = fluid.Program()
+        with fluid.program_guard(main_program, s_program):
+            input = fluid.data(
+                name="input", shape=[None, 3, 224, 224], dtype="float32")
+            origin_arch(input)
+        base_flops = flops(main_program)
+
+        search_steps = 3
+        sa_nas = SANAS(
+            configs, max_flops=base_flops, search_steps=search_steps)
+
+        for i in range(search_steps):
+            archs = sa_nas.next_archs()
+            main_program = fluid.Program()
+            s_program = fluid.Program()
+            with fluid.program_guard(main_program, s_program):
+                input = fluid.data(
+                    name="input", shape=[None, 3, 224, 224], dtype="float32")
+                archs[0](input)
+            sa_nas.reward(1)
+            self.assertTrue(flops(main_program) < base_flops)
+
+
+if __name__ == '__main__':
+    unittest.main()