diff --git a/paddleslim/quant/layers/__init__.py b/paddleslim/quant/layers/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..34e5a1ea510da11c5619ad896c21ebb5bfaa6aa9
--- /dev/null
+++ b/paddleslim/quant/layers/__init__.py
@@ -0,0 +1,17 @@
+# Copyright (c) 2023  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 .parallel_linear import QuantizedColumnParallelLinear, QuantizedRowParallelLinear
+
+__all__ = ["QuantizedColumnParallelLinear", "QuantizedRowParallelLinear"]
\ No newline at end of file
diff --git a/paddleslim/quant/layers/parallel_linear.py b/paddleslim/quant/layers/parallel_linear.py
new file mode 100644
index 0000000000000000000000000000000000000000..beb06996255a9d95f87e0bb743814e8cf98cfda2
--- /dev/null
+++ b/paddleslim/quant/layers/parallel_linear.py
@@ -0,0 +1,140 @@
+# Copyright (c) 2023 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 paddle
+from paddle.nn import Layer
+from paddle.nn import functional as F
+
+from paddle.nn.quant.format import ConvertibleQuantedLayer
+
+
+class QuantizedRowParallelLinear(ConvertibleQuantedLayer):
+    """
+    The computational logic of QuantizedRowParallelLinear is the same as RowParallelLinear.
+    The only difference is that its inputs are all fake quantized.
+    """
+
+    def __init__(self, layer: Layer, q_config):
+        super().__init__()
+        # For Linear
+        self.weight = layer.weight
+        self.bias = layer.bias
+        self._name = layer._name
+        self.input_is_parallel = layer.input_is_parallel
+        self.is_mp = layer.is_mp
+        self.model_parallel_group = layer.model_parallel_group
+        self.linear = layer.linear
+
+        # For FakeQuant
+        self.weight_quanter = None
+        self.activation_quanter = None
+        if q_config.weight is not None:
+            self.weight_quanter = q_config.weight._instance(layer)
+        if q_config.activation is not None:
+            self.activation_quanter = q_config.activation._instance(layer)
+
+    def forward(self, input):
+        quant_input = input
+        quant_weight = self.weight
+        if self.activation_quanter is not None:
+            quant_input = self.activation_quanter(input)
+        if self.weight_quanter is not None:
+            quant_weight = self.weight_quanter(self.weight)
+        return self._linear_forward(quant_input, quant_weight)
+
+    def _linear_forward(self, input, weight):
+        if self.input_is_parallel or (not self.is_mp):
+            input_parallel = input
+        else:
+            # split last dim
+            input_parallel = paddle.distributed.collective._c_split(
+                input, group=self.model_parallel_group)
+
+        if self.is_mp:
+            output_parallel = self.linear(
+                input_parallel, weight, name=self._name)
+            output_ = paddle.distributed.collective._mp_allreduce(
+                output_parallel,
+                group=self.model_parallel_group,
+                use_calc_stream=True,
+                use_model_parallel=True)
+            output = output_ + self.bias if self.bias is not None else output_
+        else:
+            output = self.linear(
+                input_parallel, weight, self.bias, name=self._name)
+        return output
+
+    def weights_to_quanters(self):
+        return [('weight', 'weight_quanter')]
+
+    def activation_quanters(self):
+        return ['activation_quanter']
+
+
+class QuantizedColumnParallelLinear(ConvertibleQuantedLayer):
+    """
+    The computational logic of QuantizedColumnParallelLinear is the same as ColumnParallelLinear.
+    The only difference is that its inputs are all fake quantized.
+    """
+
+    def __init__(self, layer: Layer, q_config):
+        super().__init__()
+        # For Linear
+        self.weight = layer.weight
+        self.bias = layer.bias
+        self._name = layer._name
+        self.is_mp = layer.is_mp
+        self.model_parallel_group = layer.model_parallel_group
+        self.gather_output = layer.gather_output
+        self.linear = layer.linear
+
+        # For FakeQuant
+        self.weight_quanter = None
+        self.activation_quanter = None
+        if q_config.weight is not None:
+            self.weight_quanter = q_config.weight._instance(layer)
+        if q_config.activation is not None:
+            self.activation_quanter = q_config.activation._instance(layer)
+
+    def forward(self, input):
+        quant_input = input
+        quant_weight = self.weight
+        if self.activation_quanter is not None:
+            quant_input = self.activation_quanter(input)
+        if self.weight_quanter is not None:
+            quant_weight = self.weight_quanter(self.weight)
+        return self._linear_forward(quant_input, quant_weight)
+
+    def _linear_forward(self, input, weight):
+        if self.is_mp:
+            input_parallel = paddle.distributed.collective._c_identity(
+                input, group=self.model_parallel_group)
+        else:
+            input_parallel = input
+
+        output_parallel = self.linear(
+            input_parallel, weight, self.bias, name=self._name)
+
+        if self.gather_output and self.is_mp:
+            output = paddle.distributed.collective._c_concat(
+                output_parallel, group=self.model_parallel_group)
+        else:
+            output = output_parallel
+        return output
+
+    def weights_to_quanters(self):
+        return [('weight', 'weight_quanter')]
+
+    def activation_quanters(self):
+        return ['activation_quanter']
diff --git a/paddleslim/quant/observers/emd.py b/paddleslim/quant/observers/emd.py
index eeaf348fdddbba62e7617a21ecce344f0aee1189..02bea81a588158720b362081176a2f324788bac4 100644
--- a/paddleslim/quant/observers/emd.py
+++ b/paddleslim/quant/observers/emd.py
@@ -63,6 +63,7 @@ class EMDObserverLayer(UniformObserver):
         abs_max_value = float(paddle.max(paddle.flatten(inputs)))
         abs_max_value = 1e-8 if abs_max_value == 0.0 else abs_max_value
         s = 0.3
+        scale_emd = abs_max_value
         while s <= 1.0:
             scale = s * abs_max_value
             s += 0.02
@@ -78,8 +79,8 @@ class EMDObserverLayer(UniformObserver):
             emd_loss = float(emd_loss)
             if emd_loss <= self._calibration_loss:
                 self._calibration_loss = emd_loss
-
-        return 0, scale
+                scale_emd = scale
+        return 0, scale_emd
 
     def cal_thresholds(self):
         """ Compute thresholds for MAX function.
diff --git a/paddleslim/quant/observers/mse.py b/paddleslim/quant/observers/mse.py
index 2641fadd45bdb705e76121640e128b2ceff43850..6deab94ad833cf18b3cbb1113e52b2dfcf827e0f 100644
--- a/paddleslim/quant/observers/mse.py
+++ b/paddleslim/quant/observers/mse.py
@@ -64,6 +64,7 @@ class MSEObserverLayer(UniformObserver):
         abs_max_value = float(paddle.max(paddle.abs(inputs.flatten())))
         abs_max_value = 1e-8 if abs_max_value == 0.0 else abs_max_value
         s = 0.3
+        scale_mse = abs_max_value
         while s <= 1.0:
             scale = s * abs_max_value
             s += 0.02
@@ -75,8 +76,8 @@ class MSEObserverLayer(UniformObserver):
             mse_loss = float(((inputs - quant_dequant_var)**2).mean())
             if mse_loss <= self.calibration_loss:
                 self.calibration_loss = mse_loss
-
-        return 0, scale
+                scale_mse = scale
+        return 0, scale_mse
 
     def cal_thresholds(self):
         """ Compute thresholds for MAX function.
diff --git a/paddleslim/quant/observers/uniform.py b/paddleslim/quant/observers/uniform.py
index 216418a91c1d5bb053966e509da456cb5f17b991..d874fa687cc9924e604d7db696df2f4ab237aff6 100644
--- a/paddleslim/quant/observers/uniform.py
+++ b/paddleslim/quant/observers/uniform.py
@@ -89,7 +89,7 @@ class UniformObserver(BaseObserver):
         _max = max(self.max_value(), 0.)
 
         if self._symmetric:
-            self._scale = max(-_min, _max) / (float(_qmax - _qmin) / 2)
+            self._scale = max(-_min, _max)
             if self._sign:
                 self._zero_point = 0
             else:
diff --git a/tests/distribution/test_quant_parallel_layers.py b/tests/distribution/test_quant_parallel_layers.py
new file mode 100644
index 0000000000000000000000000000000000000000..212a723b462818ba7769d7ef79d77090e0f8b8c2
--- /dev/null
+++ b/tests/distribution/test_quant_parallel_layers.py
@@ -0,0 +1,337 @@
+# 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.
+
+import unittest
+import sys
+import os
+import unittest
+import paddle
+import tempfile
+import random
+import numpy as np
+sys.path.append("../../")
+import paddle
+import paddle.distributed as dist
+import paddle.distributed.fleet as fleet
+import paddle.fluid as fluid
+import paddle.nn as nn
+from paddle.distributed.utils.launch_utils import find_free_ports, get_cluster
+from paddle.quantization import QuantConfig
+from paddle.quantization import QAT
+from paddle.quantization.quanters import FakeQuanterWithAbsMaxObserver
+from paddle.quantization.quanters.abs_max import FakeQuanterWithAbsMaxObserverLayer
+from paddle.nn.quant.format import LinearDequanter, LinearQuanter
+from paddle.distributed.fleet.meta_parallel import ColumnParallelLinear, RowParallelLinear, VocabParallelEmbedding
+from paddleslim.quant.layers import QuantizedColumnParallelLinear, QuantizedRowParallelLinear
+import logging
+from paddleslim.common import get_logger
+_logger = get_logger(__name__, level=logging.INFO)
+
+
+def set_random_seed(seed, dp_id, rank_id):
+    """Set random seed for reproducability."""
+    random.seed(seed)
+    np.random.seed(seed + dp_id)
+    paddle.seed(seed + rank_id)
+
+
+vocab_size = 20
+hidden_size = 10
+inner_size = 8
+output_size = 10
+seq_length = 2
+batch_size = 4
+
+
+def get_attr(layer, name):
+    if getattr(layer, name, None) is not None:
+        return getattr(layer, name, None)
+    else:
+        return get_attr(layer._layer, name)
+
+
+def get_gpus(selected_gpus):
+    selected_gpus = [x.strip() for x in selected_gpus.split(',')]
+    return selected_gpus
+
+
+def get_cluster_from_args(selected_gpus):
+    cluster_node_ips = '127.0.0.1'
+    node_ip = '127.0.0.1'
+
+    node_ips = [x.strip() for x in cluster_node_ips.split(',')]
+
+    node_ips.index(node_ip)
+
+    free_ports = None
+
+    free_ports = find_free_ports(len(selected_gpus))
+    if free_ports is not None:
+        free_ports = list(free_ports)
+
+    trainer_endpoints = []
+    for ip in node_ips:
+        trainer_endpoints.append(["%s:%d" % (ip, port) for port in free_ports])
+    return get_cluster(node_ips, node_ip, trainer_endpoints, selected_gpus)
+
+
+def parallel_matmul(lm_output, logit_weights, parallel_output):
+    hcg = fleet.get_hybrid_communicate_group()
+    model_parallel_group = hcg.get_model_parallel_group()
+    world_size = hcg.get_model_parallel_world_size()
+    rank = hcg.get_model_parallel_rank()
+
+    if world_size > 1:
+        input_parallel = paddle.distributed.collective._c_identity(
+            lm_output, group=model_parallel_group)
+
+        logits = paddle.matmul(input_parallel, logit_weights, transpose_y=True)
+
+        if parallel_output:
+            return logits
+
+        return paddle.distributed.collective._c_concat(
+            logits, group=model_parallel_group)
+    else:
+        logits = paddle.matmul(lm_output, logit_weights, transpose_y=True)
+        return logits
+
+
+class SimpleMPNet(nn.Layer):
+    def __init__(
+            self,
+            vocab_size,
+            hidden_size,
+            inner_size,
+            output_size,
+            np_fc1,
+            np_fc2,
+            mp_id, ):
+        super().__init__()
+
+        if mp_id == 0:
+            init_fc1_data = np_fc1[:, :(inner_size // 2)]
+            init_fc2_data = np_fc2[:(inner_size // 2), :]
+        else:
+            init_fc1_data = np_fc1[:, (inner_size // 2):]
+            init_fc2_data = np_fc2[(inner_size // 2):, :]
+
+        self.linear1 = ColumnParallelLinear(
+            hidden_size,
+            inner_size,
+            weight_attr=paddle.framework.ParamAttr(
+                initializer=paddle.nn.initializer.Assign(init_fc1_data)),
+            gather_output=False,
+            has_bias=True, )
+
+        self.linear2 = RowParallelLinear(
+            inner_size,
+            hidden_size,
+            weight_attr=paddle.framework.ParamAttr(
+                initializer=paddle.nn.initializer.Assign(init_fc2_data)),
+            input_is_parallel=True,
+            has_bias=True, )
+
+        self.linear3 = paddle.nn.Linear(
+            hidden_size,
+            output_size,
+            weight_attr=paddle.framework.ParamAttr(
+                initializer=paddle.nn.initializer.Constant(0.0)),
+            bias_attr=paddle.framework.ParamAttr(
+                initializer=paddle.nn.initializer.Constant(0.0)), )
+
+        self.embedding = VocabParallelEmbedding(
+            vocab_size,
+            hidden_size,
+            weight_attr=paddle.nn.initializer.Constant(value=1.0), )
+
+    def forward(self, x):
+        x = self.embedding(x)
+        x = self.linear1(x)
+        x = self.linear2(x)
+        x = self.linear3(x)
+        x = parallel_matmul(x, self.embedding.weight, False)
+        return x
+
+
+class SimpleDPNet(nn.Layer):
+    def __init__(self, vocab_size, hidden_size, inner_size, output_size, np_fc1,
+                 np_fc2):
+
+        super().__init__()
+        self.linear1 = paddle.nn.Linear(
+            hidden_size,
+            inner_size,
+            weight_attr=paddle.framework.ParamAttr(
+                initializer=paddle.nn.initializer.Assign(np_fc1)),
+            bias_attr=paddle.framework.ParamAttr(
+                initializer=paddle.nn.initializer.Constant(0.0)), )
+
+        self.linear2 = paddle.nn.Linear(
+            inner_size,
+            hidden_size,
+            weight_attr=paddle.framework.ParamAttr(
+                initializer=paddle.nn.initializer.Assign(np_fc2)),
+            bias_attr=paddle.framework.ParamAttr(
+                initializer=paddle.nn.initializer.Constant(0.0)), )
+
+        self.linear3 = paddle.nn.Linear(
+            hidden_size,
+            output_size,
+            weight_attr=paddle.framework.ParamAttr(
+                initializer=paddle.nn.initializer.Constant(0.0)),
+            bias_attr=paddle.framework.ParamAttr(
+                initializer=paddle.nn.initializer.Constant(0.0)), )
+
+        self.embedding = paddle.nn.Embedding(
+            vocab_size,
+            hidden_size,
+            weight_attr=paddle.nn.initializer.Constant(value=1.0), )
+
+    def forward(self, x):
+        x = self.embedding(x)
+        x = self.linear1(x)
+        x = self.linear2(x)
+        x = self.linear3(x)
+        x = paddle.matmul(x, self.embedding.weight, transpose_y=True)
+        return x
+
+
+class TestDistMPTraning(unittest.TestCase):
+    def setUp(self):
+        strategy = fleet.DistributedStrategy()
+        self.model_parallel_size = 2
+        self.data_parallel_size = 1
+        strategy.hybrid_configs = {
+            "dp_degree": self.data_parallel_size,
+            "mp_degree": self.model_parallel_size,
+            "pp_degree": 1,
+        }
+        fleet.init(is_collective=True, strategy=strategy)
+        self.onnx_format = False
+        self.check_export_model_accuracy = True
+        self.diff_threshold = 0.01
+        self.fuse_conv_bn = False
+
+    def train_batch(self, batch, model, optimizer, is_mp):
+        output = model(batch)
+        loss = output.mean()
+        loss.backward()  # do backward
+        optimizer.step()  # update parameters
+        optimizer.clear_grad()
+        return loss
+
+    def build_optimizer(self, model):
+        optimizer = paddle.optimizer.SGD(
+            learning_rate=0.001, parameters=model.parameters())
+        return optimizer
+
+    def build_model_optimizer(self, qat):
+        hcg = fleet.get_hybrid_communicate_group()
+        word_size = hcg.get_model_parallel_world_size()
+        mp_id = hcg.get_model_parallel_rank()
+        dp_id = hcg.get_data_parallel_rank()
+        rank_id = dist.get_rank()
+        set_random_seed(1024, dp_id, rank_id)
+
+        np_fc1 = np.ones((hidden_size, inner_size))
+        np_fc2 = np.ones((inner_size, hidden_size))
+
+        model_a = SimpleMPNet(
+            vocab_size,
+            hidden_size,
+            inner_size,
+            output_size,
+            np_fc1,
+            np_fc2,
+            mp_id, )
+        model_a = qat.quantize(model_a, inplace=True)
+        optimizer_a = self.build_optimizer(model_a)
+        model_a = fleet.distributed_model(model_a)
+        optimizer_a = fleet.distributed_optimizer(optimizer_a)
+
+        model_b = SimpleDPNet(vocab_size, hidden_size, inner_size, output_size,
+                              np_fc1, np_fc2)
+        model_b = qat.quantize(model_b, inplace=True)
+        optimizer_b = self.build_optimizer(model_b)
+
+        return model_a, optimizer_a, model_b, optimizer_b
+
+    def train(self, model_a, optimizer_a, model_b, optimizer_b):
+
+        for epoch in range(5):
+
+            np_data = np.random.randint(
+                0,
+                vocab_size,
+                (batch_size, seq_length, ), )
+            batch = paddle.to_tensor(np_data, dtype='int32')
+            loss_a = self.train_batch(batch, model_a, optimizer_a, True)
+            loss_b = self.train_batch(batch, model_b, optimizer_b, False)
+
+            np.testing.assert_allclose(
+                loss_a.numpy(), loss_b.numpy(), rtol=1e-6)
+
+    def test_mp_model_1(self):
+        if (not fluid.core.is_compiled_with_cuda() or
+                fluid.core.get_cuda_device_count() == 0):
+            return
+        selected_gpus = get_gpus('0,1')
+        cluster = None
+        pod = None
+        observer = FakeQuanterWithAbsMaxObserver()
+        q_config = QuantConfig(activation=None, weight=None)
+        q_config.add_type_config(
+            ColumnParallelLinear, activation=observer, weight=observer)
+        q_config.add_type_config(
+            RowParallelLinear, activation=observer, weight=observer)
+        q_config.add_type_config(
+            nn.Linear, activation=observer, weight=observer)
+        q_config.add_qat_layer_mapping(ColumnParallelLinear,
+                                       QuantizedColumnParallelLinear)
+        q_config.add_qat_layer_mapping(RowParallelLinear,
+                                       QuantizedRowParallelLinear)
+        qat = QAT(q_config)
+        model_a, optimizer_a, model_b, optimizer_b = self.build_model_optimizer(
+            qat)
+        self.train(model_a, optimizer_a, model_b, optimizer_b)
+
+    def test_mp_model_2(self):
+        if (not fluid.core.is_compiled_with_cuda() or
+                fluid.core.get_cuda_device_count() == 0):
+            return
+        selected_gpus = get_gpus('0,1')
+        cluster = None
+        pod = None
+        observer = FakeQuanterWithAbsMaxObserver()
+        q_config = QuantConfig(activation=None, weight=None)
+        q_config.add_type_config(
+            ColumnParallelLinear, activation=observer, weight=observer)
+        q_config.add_type_config(
+            RowParallelLinear, activation=observer, weight=observer)
+        q_config.add_type_config(
+            nn.Linear, activation=observer, weight=observer)
+        q_config.add_qat_layer_mapping(ColumnParallelLinear,
+                                       QuantizedColumnParallelLinear)
+        q_config.add_qat_layer_mapping(RowParallelLinear,
+                                       QuantizedRowParallelLinear)
+        qat = QAT(q_config)
+
+        model_a, optimizer_a, model_b, optimizer_b = self.build_model_optimizer(
+            qat)
+        self.train(model_a, optimizer_a, model_b, optimizer_b)
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/quantization/test_observers_acc.py b/tests/quantization/test_observers_acc.py
new file mode 100644
index 0000000000000000000000000000000000000000..a2b0368520116f13552be5dfe21aaebcc02ec25a
--- /dev/null
+++ b/tests/quantization/test_observers_acc.py
@@ -0,0 +1,242 @@
+# Copyright (c) 2023  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 os
+import unittest
+import paddle
+import tempfile
+import numpy as np
+
+from paddle.vision.models import resnet18
+from paddle.quantization import QuantConfig
+from paddle.quantization import PTQ
+
+from paddleslim.quant.observers import HistObserver, KLObserver, EMDObserver, MSEObserver, AVGObserver
+from paddleslim.quant.observers.hist import PercentHistObserverLayer
+from paddleslim.quant.observers.kl import KLObserverLayer
+from paddleslim.quant.observers.mse import MSEObserverLayer
+from paddleslim.quant.observers.avg import AVGObserverLayer
+from paddleslim.quant.observers.emd import EMDObserverLayer
+from paddleslim.quant.observers.kl import KLObserverLayer
+from paddle.nn.quant.format import LinearDequanter, LinearQuanter
+
+import logging
+from paddleslim.common import get_logger
+_logger = get_logger(__name__, level=logging.INFO)
+
+
+class ImperativeLenet(paddle.nn.Layer):
+    def __init__(self, num_classes=10, classifier_activation='softmax'):
+        super(ImperativeLenet, self).__init__()
+        self.features = paddle.nn.Sequential(
+            paddle.nn.Conv2D(
+                in_channels=1,
+                out_channels=6,
+                kernel_size=3,
+                stride=1,
+                padding=1),
+            paddle.nn.AvgPool2D(kernel_size=2, stride=2),
+            paddle.nn.Conv2D(
+                in_channels=6,
+                out_channels=16,
+                kernel_size=5,
+                stride=1,
+                padding=0), paddle.nn.AvgPool2D(kernel_size=2, stride=2))
+
+        self.fc = paddle.nn.Sequential(
+            paddle.nn.Linear(in_features=400, out_features=120),
+            paddle.nn.Linear(in_features=120, out_features=84),
+            paddle.nn.Linear(in_features=84, out_features=num_classes), )
+
+    def forward(self, inputs):
+        x = self.features(inputs)
+
+        x = paddle.flatten(x, 1)
+        x = self.fc(x)
+        return x
+
+
+class TestPTQObserverAcc(unittest.TestCase):
+    def __init__(self, observer, observer_type, *args, **kvargs):
+        super(TestPTQObserverAcc, self).__init__(*args, **kvargs)
+        self.observer = observer
+        self.observer_type = observer_type
+
+    def setUp(self):
+        paddle.set_device("cpu")
+        self.init_case()
+        self.dummy_input = paddle.rand([1, 3, 224, 224])
+        self.temp_dir = tempfile.TemporaryDirectory(dir="./")
+        self.path = os.path.join(self.temp_dir.name, 'qat')
+        if not os.path.exists('ILSVRC2012_data_demo'):
+            os.system(
+                'wget -q https://sys-p0.bj.bcebos.com/slim_ci/ILSVRC2012_data_demo.tar.gz'
+            )
+            os.system('tar -xf ILSVRC2012_data_demo.tar.gz')
+        seed = 1
+        np.random.seed(seed)
+        paddle.static.default_main_program().random_seed = seed
+        paddle.static.default_startup_program().random_seed = seed
+
+    def tearDown(self):
+        self.temp_dir.cleanup()
+
+    def runTest(self):
+        self.test_convergence()
+
+    def init_case(self):
+        self.q_config = QuantConfig(activation=None, weight=None)
+        self.q_config.add_type_config(
+            paddle.nn.Conv2D, activation=self.observer, weight=self.observer)
+
+    def _count_layers(self, model, layer_type):
+        count = 0
+        for _layer in model.sublayers(True):
+            if isinstance(_layer, layer_type):
+                count += 1
+        return count
+
+    def test_convergence(self):
+        model = ImperativeLenet()
+        place = paddle.CUDAPlace(0) \
+            if paddle.is_compiled_with_cuda() else paddle.CPUPlace()
+
+        transform = paddle.vision.transforms.Compose([
+            paddle.vision.transforms.Transpose(),
+            paddle.vision.transforms.Normalize([127.5], [127.5])
+        ])
+
+        train_dataset = paddle.vision.datasets.MNIST(
+            mode='train', backend='cv2', transform=transform)
+        val_dataset = paddle.vision.datasets.MNIST(
+            mode='test', backend='cv2', transform=transform)
+
+        train_reader = paddle.io.DataLoader(
+            train_dataset,
+            drop_last=True,
+            places=place,
+            batch_size=64,
+            return_list=True)
+        test_reader = paddle.io.DataLoader(
+            val_dataset, places=place, batch_size=64, return_list=True)
+
+        def train(model):
+            adam = paddle.optimizer.Adam(
+                learning_rate=0.0001, parameters=model.parameters())
+            epoch_num = 1
+            for epoch in range(epoch_num):
+                model.train()
+                for batch_id, data in enumerate(train_reader):
+                    img = paddle.to_tensor(data[0])
+                    label = paddle.to_tensor(data[1])
+                    img = paddle.reshape(img, [-1, 1, 28, 28])
+                    label = paddle.reshape(label, [-1, 1])
+
+                    out = model(img)
+                    acc = paddle.metric.accuracy(out, label)
+                    loss = paddle.nn.functional.loss.cross_entropy(out, label)
+                    avg_loss = paddle.mean(loss)
+                    avg_loss.backward()
+                    adam.minimize(avg_loss)
+                    model.clear_gradients()
+                    if batch_id % 100 == 0:
+                        _logger.info(
+                            "Train | At epoch {} step {}: loss = {:}, acc= {:}".
+                            format(epoch, batch_id,
+                                   avg_loss.numpy(), acc.numpy()))
+
+        def test(model):
+            model.eval()
+            avg_acc = [[], []]
+            for batch_id, data in enumerate(test_reader):
+                img = paddle.to_tensor(data[0])
+                img = paddle.reshape(img, [-1, 1, 28, 28])
+                label = paddle.to_tensor(data[1])
+                label = paddle.reshape(label, [-1, 1])
+
+                out = model(img)
+                acc_top1 = paddle.metric.accuracy(input=out, label=label, k=1)
+                acc_top5 = paddle.metric.accuracy(input=out, label=label, k=5)
+                avg_acc[0].append(acc_top1.numpy())
+                avg_acc[1].append(acc_top5.numpy())
+                if batch_id % 100 == 0:
+                    _logger.info(
+                        "Test | step {}: acc1 = {:}, acc5 = {:}".format(
+                            batch_id, acc_top1.numpy(), acc_top5.numpy()))
+
+            _logger.info("Test | Average: acc_top1 {}, acc_top5 {}".format(
+                np.mean(avg_acc[0]), np.mean(avg_acc[1])))
+            return np.mean(avg_acc[0]), np.mean(avg_acc[1])
+
+        def ptq_sample(model):
+            model.eval()
+            avg_acc = [[], []]
+            for batch_id, data in enumerate(test_reader):
+                img = paddle.to_tensor(data[0])
+                img = paddle.reshape(img, [-1, 1, 28, 28])
+                label = paddle.to_tensor(data[1])
+                label = paddle.reshape(label, [-1, 1])
+
+                out = model(img)
+
+                if batch_id % 100 == 0:
+                    _logger.info("PTQ sampling | step {}".format(batch_id))
+
+        train(model)
+        top1_1, top5_1 = test(model)
+        ptq = PTQ(self.q_config)
+        model.eval()
+        quant_model = ptq.quantize(model, inplace=False)
+
+        ptq_sample(quant_model)
+        converted_model = ptq.convert(quant_model, inplace=False)
+        top1_2, top5_2 = test(converted_model)
+
+        _logger.info(
+            "Before quantization: top1: {}, top5: {}".format(top1_1, top5_1))
+        _logger.info(
+            "After quantization: top1: {}, top5: {}".format(top1_2, top5_2))
+        _logger.info("\n")
+
+        diff = 0.01
+        self.assertTrue(
+            top1_1 - top1_2 < diff,
+            msg="The acc of quant model is too lower than fp32 model")
+        _logger.info('done')
+        return
+
+
+observer_suite = unittest.TestSuite()
+observer_suite.addTest(
+    TestPTQObserverAcc(
+        observer=HistObserver(sign=True, symmetric=True),
+        observer_type=PercentHistObserverLayer))
+observer_suite.addTest(
+    TestPTQObserverAcc(
+        observer=KLObserver(bins_count=256), observer_type=KLObserverLayer))
+
+observer_suite.addTest(
+    TestPTQObserverAcc(observer=AVGObserver(), observer_type=AVGObserverLayer))
+observer_suite.addTest(
+    TestPTQObserverAcc(observer=EMDObserver(), observer_type=EMDObserverLayer))
+observer_suite.addTest(
+    TestPTQObserverAcc(observer=MSEObserver(), observer_type=MSEObserverLayer))
+
+if __name__ == '__main__':
+    runner = unittest.TextTestRunner(verbosity=2)
+    runner.run(observer_suite)
+    os.system('rm -rf ILSVRC2012_data_demo.tar.gz')
+    os.system('rm -rf ILSVRC2012_data_demo')