diff --git a/paddle/fluid/operators/assign_pos_op.cc b/paddle/fluid/operators/assign_pos_op.cc
new file mode 100644
index 0000000000000000000000000000000000000000..69c0283c7bffb33cd49c1d0374f647828364dc67
--- /dev/null
+++ b/paddle/fluid/operators/assign_pos_op.cc
@@ -0,0 +1,80 @@
+/* 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. */
+
+#include "paddle/fluid/operators/assign_pos_op.h"
+
+namespace paddle {
+namespace operators {
+
+class AssignPosOp : public framework::OperatorWithKernel {
+ public:
+  using framework::OperatorWithKernel::OperatorWithKernel;
+
+  void InferShape(framework::InferShapeContext* ctx) const override {
+    OP_INOUT_CHECK(ctx->HasInput("cum_count"), "Input", "cum_count",
+                   "AssignPos");
+    OP_INOUT_CHECK(ctx->HasInput("eff_num_len"), "Input", "eff_num_len",
+                   "AssignPos");
+    OP_INOUT_CHECK(ctx->HasInput("X"), "Input", "X", "AssignPos");
+    OP_INOUT_CHECK(ctx->HasOutput("Out"), "Output", "Out", "AssignPos");
+  }
+
+ protected:
+  framework::OpKernelType GetExpectedKernelType(
+      const framework::ExecutionContext& ctx) const override {
+    auto cum_count_dtype =
+        OperatorWithKernel::IndicateVarDataType(ctx, "cum_count");
+    auto X_dtype = OperatorWithKernel::IndicateVarDataType(ctx, "X");
+
+    PADDLE_ENFORCE_EQ(cum_count_dtype, X_dtype,
+                      platform::errors::InvalidArgument(
+                          "The dtype of the cum_count and X should be same"));
+    PADDLE_ENFORCE_EQ(cum_count_dtype, framework::proto::VarType::INT64,
+                      platform::errors::InvalidArgument(
+                          "The dtype of the cum_count_dtype, eff_num_len and "
+                          "X should be same as int64"));
+    return framework::OpKernelType(cum_count_dtype, ctx.device_context());
+  }
+};
+
+class AssignPosOpMaker : public framework::OpProtoAndCheckerMaker {
+ public:
+  void Make() override {
+    AddInput("X", "numbers to scatter.");
+    AddInput("cum_count", "The cumulative sum count of numbers.");
+    AddInput("eff_num_len",
+             "The effective numbers of numbers should be scattered.");
+    AddOutput("Out", "Assemble numbers in the order of counters.");
+
+    AddComment(R"DOC(
+assign_pos_op Operator.
+
+Assign pos decides which tokens should be fetched belong to 
+specially counter orderingly.
+
+)DOC");
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle
+
+namespace ops = paddle::operators;
+namespace plat = paddle::platform;
+
+REGISTER_OP_WITHOUT_GRADIENT(assign_pos, ops::AssignPosOp,
+                             ops::AssignPosOpMaker);
+
+REGISTER_OP_CPU_KERNEL(assign_pos, ops::AssignPosOpCPUKernel<int>,
+                       ops::AssignPosOpCPUKernel<int64_t>);
diff --git a/paddle/fluid/operators/assign_pos_op.cu b/paddle/fluid/operators/assign_pos_op.cu
new file mode 100644
index 0000000000000000000000000000000000000000..5fa159b94f9834e43db1cb0a419eefd2f60181b0
--- /dev/null
+++ b/paddle/fluid/operators/assign_pos_op.cu
@@ -0,0 +1,94 @@
+/* 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. */
+
+#include "paddle/fluid/framework/op_registry.h"
+#include "paddle/fluid/operators/assign_pos_op.h"
+#include "paddle/fluid/platform/device/gpu/gpu_primitives.h"
+#include "paddle/fluid/platform/float16.h"
+
+DECLARE_bool(avoid_op_randomness);
+
+namespace paddle {
+namespace operators {
+
+static constexpr int kNumCUDAThreads = 512;
+static constexpr int kNumMaxinumNumBlocks = 4096;
+
+static inline int NumBlocks(const int N) {
+  return std::min((N + kNumCUDAThreads - 1) / kNumCUDAThreads,
+                  kNumMaxinumNumBlocks);
+}
+
+template <typename T>
+__global__ void AssignPos(T* cum_count, const T* numbers, T* out,
+                          int64_t limit) {
+  CUDA_KERNEL_LOOP(i, limit) {
+    int number_idx = numbers[i];
+    if (number_idx > -1) {
+      int p = platform::CudaAtomicAdd(cum_count + number_idx, -1);
+      out[p - 1] = i;
+    }
+  }
+}
+
+template <typename T>
+class AssignPosCUDAKernel : public framework::OpKernel<T> {
+ public:
+  void Compute(const framework::ExecutionContext& context) const override {
+    // assign pos decides which tokens should be fetched belong to specially
+    // counter orderingly.
+    auto cum_count = context.Input<LoDTensor>(
+        "cum_count");  // (counter number) int32 | int64
+    auto numbers =
+        context.Input<LoDTensor>("X");  // (batch_size * seq_len, topk) int32
+    auto eff_num_len =
+        context.Input<LoDTensor>("eff_num_len");  // (sum(cum_count))
+    auto out = context.Output<LoDTensor>("Out");  // (cum_count) value ranges
+                                                  // from 0 to batch_size *
+                                                  // seq_len * topk
+    auto place = context.GetPlace();
+    auto numel = numbers->numel();
+    T* cum_data = const_cast<T*>(cum_count->data<T>());
+    auto cum_size = cum_count->numel();
+
+    framework::Tensor cpu_eff_num_len;
+    int64_t cpu_eff_num_len_data = 0;
+    if (platform::is_cpu_place(eff_num_len->place())) {
+      cpu_eff_num_len_data = eff_num_len->data<T>()[0];
+    } else {
+      framework::TensorCopySync(*eff_num_len, platform::CPUPlace(),
+                                &cpu_eff_num_len);
+      cpu_eff_num_len_data = cpu_eff_num_len.data<T>()[0];
+    }
+    const auto& dev_ctx =
+        context.template device_context<platform::CUDADeviceContext>();
+    framework::DDim out_dims = phi::make_ddim({cpu_eff_num_len_data});
+    auto out_data = out->mutable_data<T>(out_dims, place);
+
+    const T* num_data = numbers->data<T>();
+
+    int blocks = NumBlocks(numel);
+    int threads = kNumCUDAThreads;
+
+    AssignPos<T><<<blocks, threads, 0, dev_ctx.stream()>>>(cum_data, num_data,
+                                                           out_data, numel);
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle
+
+namespace ops = paddle::operators;
+namespace plat = paddle::platform;
+REGISTER_OP_CUDA_KERNEL(assign_pos, ops::AssignPosCUDAKernel<int64_t>);
diff --git a/paddle/fluid/operators/assign_pos_op.h b/paddle/fluid/operators/assign_pos_op.h
new file mode 100644
index 0000000000000000000000000000000000000000..1a017415778dd058378536284d1a264944c60927
--- /dev/null
+++ b/paddle/fluid/operators/assign_pos_op.h
@@ -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 specific language governing permissions and
+limitations under the License. */
+
+#pragma once
+#include "paddle/fluid/framework/data_type.h"
+#include "paddle/fluid/framework/lod_tensor.h"
+#include "paddle/fluid/framework/op_registry.h"
+
+namespace paddle {
+namespace operators {
+
+using LoDTensor = framework::LoDTensor;
+
+template <typename T>
+class AssignPosOpCPUKernel : public framework::OpKernel<T> {
+ public:
+  void Compute(const framework::ExecutionContext& ctx) const override {
+    PADDLE_THROW(platform::errors::Unavailable(
+        "Do not support assign pos op for cpu kernel now."));
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle
diff --git a/paddle/fluid/operators/number_count_op.cc b/paddle/fluid/operators/number_count_op.cc
index 8f7a3b82acf19fa79cbf5c632977e6ae533ae12b..3b7406c997aba2885564f82cae4a21fcc59dcbdc 100644
--- a/paddle/fluid/operators/number_count_op.cc
+++ b/paddle/fluid/operators/number_count_op.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+// 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.
@@ -22,8 +22,7 @@ class NumberCountOp : public framework::OperatorWithKernel {
   using framework::OperatorWithKernel::OperatorWithKernel;
 
   void InferShape(framework::InferShapeContext* ctx) const override {
-    OP_INOUT_CHECK(ctx->HasInput("gate_idx"), "Input", "gate_idx",
-                   "NumberCount");
+    OP_INOUT_CHECK(ctx->HasInput("numbers"), "Input", "numbers", "NumberCount");
     OP_INOUT_CHECK(ctx->HasOutput("Out"), "Output", "number_count",
                    "NumberCount");
   }
@@ -31,25 +30,24 @@ class NumberCountOp : public framework::OperatorWithKernel {
  protected:
   framework::OpKernelType GetExpectedKernelType(
       const framework::ExecutionContext& ctx) const override {
-    // the dtype of the gate_idx should be same as int64
-    auto gate_idx_dtype =
-        OperatorWithKernel::IndicateVarDataType(ctx, "gate_idx");
+    // the dtype of the numbers should be same as int64
+    auto number_dtype = OperatorWithKernel::IndicateVarDataType(ctx, "numbers");
 
-    PADDLE_ENFORCE_EQ(gate_idx_dtype, framework::proto::VarType::INT64,
+    PADDLE_ENFORCE_EQ(number_dtype, framework::proto::VarType::INT64,
                       platform::errors::InvalidArgument(
-                          "The dtype of the gate_idx_dtype should be int64"));
-    return framework::OpKernelType(gate_idx_dtype, ctx.GetPlace());
+                          "The dtype of the number_dtype should be int64"));
+    return framework::OpKernelType(number_dtype, ctx.GetPlace());
   }
 };
 
 class NumberCountOpMaker : public framework::OpProtoAndCheckerMaker {
  public:
   void Make() override {
-    AddInput("gate_idx", "(Tensor) The input gate index tensor.");
-    AddOutput("Out", "(Tensor) The output expert count tensor.");
-    AddAttr<int>("upper_range", "（int), The number of experts.");
+    AddInput("numbers", "(Tensor) The input gate index tensor.");
+    AddOutput("Out", "(Tensor) The output number count tensor.");
+    AddAttr<int>("upper_range", "（int), The number of different numbers.");
 
-    AddComment(R"DOC(number_count Operator.count gate indices.)DOC");
+    AddComment(R"DOC(number_count Operator.count numbers.)DOC");
   }
 };
 
diff --git a/paddle/fluid/operators/number_count_op.cu b/paddle/fluid/operators/number_count_op.cu
index 97e4b4f2845ae132c28d3bb71dcc8e73f02e193a..0106c70d8eb53888801e942fc6c7c9ca57644062 100644
--- a/paddle/fluid/operators/number_count_op.cu
+++ b/paddle/fluid/operators/number_count_op.cu
@@ -1,4 +1,4 @@
-// Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+// 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.
@@ -38,7 +38,7 @@ __global__ void initialize_zero_kernel(T* data, const int length) {
 }
 
 template <typename T>
-__global__ void NumberCount(const T* gate_idx, T* number_count,
+__global__ void NumberCount(const T* numbers, T* number_count,
                             int64_t batch_size, int upper_range) {
   int res_tmp[PERTHREAD_EXPERTS] = {0};
   int expert_min = blockIdx.x * PERTHREAD_EXPERTS;
@@ -47,7 +47,7 @@ __global__ void NumberCount(const T* gate_idx, T* number_count,
     expert_max = upper_range;
   }
   for (int i = threadIdx.x; i < batch_size; i += blockDim.x) {
-    T idx = gate_idx[i];
+    T idx = numbers[i];
     if (idx == -1) {
       continue;
     }
@@ -76,18 +76,18 @@ template <typename T>
 class NumberCountOpCUDAKernel : public framework::OpKernel<T> {
  public:
   void Compute(const framework::ExecutionContext& context) const override {
-    auto gate_idx = context.Input<LoDTensor>("gate_idx");
+    auto numbers = context.Input<LoDTensor>("numbers");
     auto upper_range = context.Attr<int>("upper_range");
     auto number_count = context.Output<LoDTensor>("Out");
 
-    int64_t batch_size = gate_idx->numel();
+    int64_t batch_size = numbers->numel();
     auto place = context.GetPlace();
     const auto& dev_ctx =
         context.template device_context<platform::CUDADeviceContext>();
 
     framework::DDim out_dims = phi::make_ddim({upper_range});
     auto out_data = number_count->mutable_data<T>(out_dims, place);
-    const T* gate_data = gate_idx->data<T>();
+    const T* gate_data = numbers->data<T>();
 
     initialize_zero_kernel<
         T><<<GET_BLOCKS(upper_range), CUDA_NUM_THREADS, 0, dev_ctx.stream()>>>(
diff --git a/paddle/fluid/operators/number_count_op.h b/paddle/fluid/operators/number_count_op.h
index 95e64946fb8a2156fdb4cbae880ccf2c143447ed..ded7ea6eec54f7ce08ae610274febdbb4f82d292 100644
--- a/paddle/fluid/operators/number_count_op.h
+++ b/paddle/fluid/operators/number_count_op.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+// 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.
diff --git a/python/paddle/distributed/models/moe/utils.py b/python/paddle/distributed/models/moe/utils.py
index fd98c64318c60e2e67af320c51b24e39a3132c43..28cbfb4f4c74a2080fd2700533cf26a988d3fda7 100644
--- a/python/paddle/distributed/models/moe/utils.py
+++ b/python/paddle/distributed/models/moe/utils.py
@@ -17,11 +17,11 @@ from paddle.fluid.layer_helper import LayerHelper
 from paddle.fluid.framework import in_dygraph_mode
 
 
-def _number_count(gate_idx, upper_range):
+def _number_count(numbers, upper_range):
     """
     calculate the expert count according to the gate index.
     Args:
-        gate_idx (Tensor): Tensor. The input gate index whose data type should be int32 or int64.
+        numbers (Tensor): Tensor. The input gate index whose data type should be int32 or int64.
         upper_range (int): The number of the experts.
     Returns:
         out (Tensor): The output expert count.
@@ -30,26 +30,75 @@ def _number_count(gate_idx, upper_range):
             # required: distributed
             import paddle
 
-            gate_idx = [
+            numbers = [
                 [0, 2],
                 [0, 2]
             ]
             upper_range = 6
-            gate_idx = paddle.to_tensor(gate_idx, dtype="int32")
-            number_count = paddle.distributed.utils.number_count(gate_idx, upper_range)
+            numbers = paddle.to_tensor(numbers, dtype="int32")
+            number_count = paddle.distributed.utils.number_count(numbers, upper_range)
             print(number_count) # the result: [2, 0, 2, 0, 0, 0]
     """
     if in_dygraph_mode():
-        return core.ops.number_count(gate_idx, 'upper_range', upper_range)
+        return core.ops.number_count(numbers, 'upper_range', upper_range)
     else:
         op_type = 'number_count'
 
         helper = LayerHelper(op_type, **locals())
-        out = helper.create_variable_for_type_inference(dtype=gate_idx.dtype)
+        out = helper.create_variable_for_type_inference(dtype=numbers.dtype)
 
         helper.append_op(
             type=op_type,
-            inputs={'gate_idx': gate_idx},
+            inputs={'numbers': numbers},
             outputs={'Out': out},
             attrs={'upper_range': upper_range})
         return out
+
+
+def _assign_pos(x, cum_count):
+    """
+    Assign pos decides which tokens should be fetched belong to 
+    specially expert orderingly.
+    
+    Args:
+        x (Tensor): Tensor. Every element in the list must be a Tensor whose data type
+            should be float16, float32, float64, int32 or int64.
+        cum_count (Tensor): The cumulative sum tokens of counters. Every element in the list must be a Tensor whose 
+            data type should be int64.
+  
+    Returns:
+        out (Tensor): Assemble numbers in the order of counters. 
+    
+    Examples:
+        .. code-block:: python
+
+            # required: distributed
+            import paddle
+            number_count = [2, 0, 2, 0]
+            numbers = [
+                [0, 2],
+                [0, 2]
+            ]
+            number_count = paddle.to_tensor(number_count)
+            numbers = paddle.to_tensor(numbers, dtype="int32")
+            num_cum = paddle.cumsum(number_count)
+            pos = paddle.distributed.utils.assign_pos(x=numbers, cum_count=num_cum)
+            print(pos) # the result: (2, 0, 3, 1)
+    """
+    if in_dygraph_mode():
+        return core.ops.assign_pos(x, cum_count, cum_count[-1])
+    else:
+        op_type = 'assign_pos'
+
+        helper = LayerHelper(op_type, **locals())
+        out = helper.create_variable_for_type_inference(dtype=cum_count.dtype)
+
+        helper.append_op(
+            type=op_type,
+            inputs={
+                'X': [x],
+                'cum_count': [cum_count],
+                "eff_num_len": [cum_count[-1]]
+            },
+            outputs={'Out': [out]})
+        return out
diff --git a/python/paddle/fluid/tests/unittests/test_assign_pos_op.py b/python/paddle/fluid/tests/unittests/test_assign_pos_op.py
new file mode 100644
index 0000000000000000000000000000000000000000..72924f242d211d063b1d547050de79f87f2d8dac
--- /dev/null
+++ b/python/paddle/fluid/tests/unittests/test_assign_pos_op.py
@@ -0,0 +1,131 @@
+#   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 __future__ import print_function
+
+import op_test
+import numpy as np
+import unittest
+import paddle
+import paddle.fluid.core as core
+from paddle.fluid.op import Operator
+import paddle.fluid as fluid
+from paddle.fluid import compiler, Program, program_guard
+from paddle.fluid.backward import append_backward
+from paddle.distributed.models.moe import utils
+
+
+def assign_pos(x, _cum_count):
+    cum_count = np.copy(_cum_count)
+    x = x.reshape(-1)
+    res = np.zeros((cum_count[-1], ), dtype=np.int64)
+    for i, idx in enumerate(x):
+        p = cum_count[idx]
+        cum_count[idx] -= 1
+        if p >= 1:
+            res[p - 1] = i
+    return res
+
+
+def count(x, upper_num):
+    res = np.zeros((upper_num, )).astype(int)
+    for i in x.reshape(-1):
+        if i >= 0 and i < len(res):
+            res[i] += 1
+    return res
+
+
+# why defining the assert function specially?
+# Becasue assign_pos_op is multithread-op, which can make the order of numbers
+# in each counter(bin) is random. But the numbers set is certain in each counter(bin).
+np_allclose = np.allclose
+
+
+def assert_allclose(res, out, cum_count):
+    c0 = 0
+    for c in cum_count:
+        if c == c0:
+            continue
+        data1 = np.copy(res[c0:c])
+        data2 = np.copy(out[c0:c])
+        data1.sort()
+        data2.sort()
+        assert np_allclose(data2, data1)
+        c0 = c
+    return True
+
+
+def get_redefined_allclose(cum_count):
+    def redefined_allclose(x, y, *args, **kwargs):
+        return assert_allclose(x, y, cum_count)
+
+    return redefined_allclose
+
+
+@unittest.skipIf(not core.is_compiled_with_cuda(),
+                 "core is not compiled with CUDA")
+class TestAssignPosOpInt64(op_test.OpTest):
+    def setUp(self):
+        x = np.random.randint(0, 16, size=(100, 2)).astype("int64")
+        y = count(x, 16)
+        cum_count = np.cumsum(y).astype(x.dtype)
+        self.op_type = "assign_pos"
+        self.inputs = {
+            'X': x,
+            "cum_count": cum_count,
+            "eff_num_len": np.array([cum_count[-1]])
+        }
+        self.outputs = {'Out': assign_pos(x, cum_count)}
+        self.cum_count = cum_count
+
+    def test_forward(self):
+        np.allclose = get_redefined_allclose(self.cum_count)
+        self.check_output_with_place(paddle.CUDAPlace(0))
+
+
+@unittest.skipIf(not core.is_compiled_with_cuda(),
+                 "core is not compiled with CUDA")
+class TestAssignPosAPI(unittest.TestCase):
+    def setUp(self):
+        self.x = np.random.randint(0, 16, size=(100, 2)).astype("int64")
+        y = count(self.x, 16)
+        self.cum_count = np.cumsum(y).astype(self.x.dtype)
+        self.out = assign_pos(self.x, self.cum_count)
+        self.place = paddle.CUDAPlace(0)
+
+    def test_api_static(self):
+        paddle.enable_static()
+        with paddle.static.program_guard(paddle.static.Program()):
+            x = paddle.fluid.data('x', self.x.shape, dtype="int64")
+            cum_count = paddle.fluid.data(
+                'cum_count', self.cum_count.shape, dtype="int64")
+            out = utils._assign_pos(x, cum_count)
+            exe = paddle.static.Executor(self.place)
+            res = exe.run(feed={'x': self.x,
+                                "cum_count": self.cum_count},
+                          fetch_list=[out])
+            assert_allclose(res[0], self.out, self.cum_count)
+
+    def test_api_dygraph(self):
+        paddle.disable_static()
+        x = paddle.to_tensor(self.x)
+        cum_count = paddle.to_tensor(self.cum_count).astype(x.dtype)
+
+        out = utils._assign_pos(x, cum_count)
+        assert_allclose(out.numpy(), self.out, self.cum_count)
+
+
+if __name__ == '__main__':
+    paddle.enable_static()
+    unittest.main()
diff --git a/python/paddle/fluid/tests/unittests/test_number_count_op.py b/python/paddle/fluid/tests/unittests/test_number_count_op.py
index 0df9d2a3a41b44c18b7e008a271c10544ec4dfa0..9eb89dfeb0e8d9e4538f3a7004da777eafbb2f34 100644
--- a/python/paddle/fluid/tests/unittests/test_number_count_op.py
+++ b/python/paddle/fluid/tests/unittests/test_number_count_op.py
@@ -1,4 +1,4 @@
-#   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+#   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.
@@ -26,8 +26,8 @@ from paddle.fluid.backward import append_backward
 from paddle.distributed.models.moe import utils
 
 
-def count(x, upper_range):
-    res = np.zeros((upper_range, )).astype(int)
+def count(x, upper_num):
+    res = np.zeros((upper_num, )).astype(int)
     for i in x.reshape(-1):
         if i >= 0 and i < len(res):
             res[i] += 1
@@ -36,14 +36,14 @@ def count(x, upper_range):
 
 @unittest.skipIf(not core.is_compiled_with_cuda(),
                  "core is not compiled with CUDA")
-class TestExpertCountOpInt64(op_test.OpTest):
+class TestNumberCountOpInt64(op_test.OpTest):
     def setUp(self):
-        expert_num = 16
+        upper_num = 16
         self.op_type = "number_count"
-        x = np.random.randint(-1, expert_num, size=(1000, 2)).astype('int64')
-        self.inputs = {'gate_idx': x}
-        self.outputs = {'Out': count(x, expert_num)}
-        self.attrs = {"upper_range": expert_num}
+        x = np.random.randint(-1, upper_num, size=(1000, 2)).astype('int64')
+        self.inputs = {'numbers': x}
+        self.outputs = {'Out': count(x, upper_num)}
+        self.attrs = {"upper_range": upper_num}
 
     def test_forward(self):
         self.check_output_with_place(paddle.CUDAPlace(0))
@@ -51,19 +51,19 @@ class TestExpertCountOpInt64(op_test.OpTest):
 
 @unittest.skipIf(not core.is_compiled_with_cuda(),
                  "core is not compiled with CUDA")
-class TestExpertCountAPI(unittest.TestCase):
+class TestNumberCountAPI(unittest.TestCase):
     def setUp(self):
-        self.upper_range = 320
+        self.upper_num = 320
         self.x = np.random.randint(
-            -1, self.upper_range, size=(6000, 200)).astype('int64')
-        self.out = count(self.x, self.upper_range)
+            -1, self.upper_num, size=(6000, 200)).astype('int64')
+        self.out = count(self.x, self.upper_num)
         self.place = paddle.CUDAPlace(0)
 
     def test_api_static(self):
         paddle.enable_static()
         with paddle.static.program_guard(paddle.static.Program()):
             x = paddle.fluid.data('x', self.x.shape, dtype="int64")
-            out = utils._number_count(x, self.upper_range)
+            out = utils._number_count(x, self.upper_num)
             exe = paddle.static.Executor(self.place)
             res = exe.run(feed={'x': self.x}, fetch_list=[out])
             assert np.allclose(res, self.out)
@@ -71,7 +71,7 @@ class TestExpertCountAPI(unittest.TestCase):
     def test_api_dygraph(self):
         paddle.disable_static()
         x = paddle.to_tensor(self.x)
-        out = utils._number_count(x, self.upper_range)
+        out = utils._number_count(x, self.upper_num)
         assert np.allclose(out.numpy(), self.out)