diff --git a/paddle/fluid/API.spec b/paddle/fluid/API.spec
index fe8d6dd42595dfc9dc4bf17e336df801b582703e..b793bb23fc183f1fdb4b1fe1b2a9b72c1b6bf80f 100644
--- a/paddle/fluid/API.spec
+++ b/paddle/fluid/API.spec
@@ -361,6 +361,9 @@ paddle.fluid.contrib.QuantizeTranspiler.__init__ ArgSpec(args=['self', 'weight_b
 paddle.fluid.contrib.QuantizeTranspiler.convert_to_int8 ArgSpec(args=['self', 'program', 'place', 'scope'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.contrib.QuantizeTranspiler.freeze_program ArgSpec(args=['self', 'program', 'place', 'fuse_bn', 'scope'], varargs=None, keywords=None, defaults=(False, None))
 paddle.fluid.contrib.QuantizeTranspiler.training_transpile ArgSpec(args=['self', 'program', 'startup_program'], varargs=None, keywords=None, defaults=(None, None))
+paddle.fluid.contrib.Calibrator.__init__ ArgSpec(args=['self'], varargs='args', keywords='kwargs', defaults=None)
+paddle.fluid.contrib.Calibrator.sample_data ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
+paddle.fluid.contrib.Calibrator.save_int8_model ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.contrib.reader.ctr_reader.ctr_reader ArgSpec(args=['feed_dict', 'file_type', 'file_format', 'dense_slot_index', 'sparse_slot_index', 'capacity', 'thread_num', 'batch_size', 'file_list', 'slots', 'name'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.contrib.build_compressor ArgSpec(args=['place', 'data_reader', 'data_feeder', 'scope', 'metrics', 'epoch', 'config'], varargs=None, keywords=None, defaults=(None, None, None, None, None, None, None))
 paddle.fluid.contrib.CompressPass.__init__ ArgSpec(args=['self', 'place', 'data_reader', 'data_feeder', 'scope', 'metrics', 'epoch', 'program_exe'], varargs=None, keywords=None, defaults=(None, None, None, None, None, None, None))
diff --git a/python/paddle/fluid/contrib/__init__.py b/python/paddle/fluid/contrib/__init__.py
index 6127ca8a3eacd013dd258a02b9f3cc792b634137..870c57e54011361caae5265201d19f58830a87bc 100644
--- a/python/paddle/fluid/contrib/__init__.py
+++ b/python/paddle/fluid/contrib/__init__.py
@@ -22,6 +22,8 @@ from . import op_frequence
 from .op_frequence import *
 from . import quantize
 from .quantize import *
+from . import int8_inference
+from .int8_inference import *
 from . import reader
 from .reader import *
 from . import slim
@@ -34,6 +36,7 @@ __all__ += decoder.__all__
 __all__ += memory_usage_calc.__all__
 __all__ += op_frequence.__all__
 __all__ += quantize.__all__
+__all__ += int8_inference.__all__
 __all__ += reader.__all__
 __all__ += slim.__all__
 __all__ += utils.__all__
diff --git a/python/paddle/fluid/contrib/int8_inference/__init__.py b/python/paddle/fluid/contrib/int8_inference/__init__.py
index eca2dce114b069bf9b455d77ce670d73b5047fd2..45547201d598c809f7dcf3a1a09103ae5de3e4c6 100644
--- a/python/paddle/fluid/contrib/int8_inference/__init__.py
+++ b/python/paddle/fluid/contrib/int8_inference/__init__.py
@@ -11,3 +11,10 @@
 # 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
+
+from . import utility
+from .utility import *
+
+__all__ = utility.__all__
diff --git a/python/paddle/fluid/contrib/int8_inference/utility.py b/python/paddle/fluid/contrib/int8_inference/utility.py
index 40de038f28a83738e6e6cd8c77c0a9916ce68b4f..b35d9f2424ccf093f70e75b13e23f6c5ad59e859 100644
--- a/python/paddle/fluid/contrib/int8_inference/utility.py
+++ b/python/paddle/fluid/contrib/int8_inference/utility.py
@@ -11,11 +11,15 @@
 # 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 paddle.fluid.core as core
+
+from paddle.fluid import core
 import numpy as np
 import math
 import os
-import paddle.fluid as fluid
+from paddle.fluid.executor import global_scope
+from paddle.fluid import io
+
+__all__ = ['Calibrator']
 
 
 class Calibrator(object):
@@ -76,8 +80,7 @@ class Calibrator(object):
         '''
         for i in self.sampling_program.list_vars():
             if i.name in self.sampling_vars:
-                np_data = np.array(fluid.global_scope().find_var(i.name)
-                                   .get_tensor())
+                np_data = np.array(global_scope().find_var(i.name).get_tensor())
                 if i.name not in self._sampling_data:
                     self._sampling_data[i.name] = []
                 self._sampling_data[i.name].append(np_data)
@@ -86,9 +89,9 @@ class Calibrator(object):
         '''
         Save the quantized model to the disk.
         '''
-        fluid.io.save_inference_model(self.output, self.feed_var_names,
-                                      self.fetch_list, self.exe,
-                                      self.sampling_program)
+        io.save_inference_model(self.output, self.feed_var_names,
+                                self.fetch_list, self.exe,
+                                self.sampling_program)
 
     def __display_debug(self):
         if self.debug:
diff --git a/python/paddle/fluid/contrib/tests/test_calibration.py b/python/paddle/fluid/contrib/tests/test_calibration.py
index cd6b7ba1661a4614b3b645a687e0a1eab3cb60f8..424ea245a0f2dff0d437ace386f2e4e0fa6b517d 100644
--- a/python/paddle/fluid/contrib/tests/test_calibration.py
+++ b/python/paddle/fluid/contrib/tests/test_calibration.py
@@ -24,8 +24,7 @@ import contextlib
 from paddle.dataset.common import download
 from PIL import Image, ImageEnhance
 import math
-sys.path.append('..')
-import int8_inference.utility as int8_utility
+import paddle.fluid.contrib.int8_inference.utility as int8_utility
 
 random.seed(0)
 np.random.seed(0)
diff --git a/python/setup.py.in b/python/setup.py.in
index c947785cbf7517be56c3e43120db65284ab22d10..f93f0cd130e33311bade2b15726c3eff37546214 100644
--- a/python/setup.py.in
+++ b/python/setup.py.in
@@ -109,6 +109,7 @@ packages=['paddle',
           'paddle.fluid.contrib',
           'paddle.fluid.contrib.decoder',
           'paddle.fluid.contrib.quantize',
+          'paddle.fluid.contrib.int8_inference',
           'paddle.fluid.contrib.reader',
           'paddle.fluid.contrib.slim',
           'paddle.fluid.contrib.slim.core',