diff --git a/python/paddle/fleet/metrics/metric.py b/python/paddle/fleet/metrics/metric.py
index 847ddc47ac89114f2012bc6b9990a69abfe39fb3..83e0dd2e541c3222a25504f906eb15cf2708aae2 100644
--- a/python/paddle/fleet/metrics/metric.py
+++ b/python/paddle/fleet/metrics/metric.py
@@ -11,3 +11,375 @@
 # 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.
+"""Fleet Metrics"""
+
+import paddle.fluid as fluid
+import math
+import numpy as np
+from paddle.fluid.framework import Variable
+from paddle.fluid.incubate.fleet.parameter_server.pslib import fleet as fleet
+
+
+def sum(input, scope=None):
+    """
+    distributed sum in fleet
+
+    Args:
+        input(numpy.array|Variable|string): output of a layer
+        scope(Scope): specific scope
+
+    Returns:
+        global_metric(numpy.array): sum array
+
+    Example:
+        .. code-block:: python
+
+          # in model.py
+          input = fluid.layers.cast(some_input, dtype='float32')
+          cnt = fluid.layers.reduce_sum(input)
+          global_cnt = fluid.layers.create_global_var(persistable=True, dtype='float32', shape=[1], value=0)
+          tmp = fluid.layers.elementwise_add(cnt, global_cnt)
+          fluid.layers.assign(tmp, global_cnt)
+          
+          # in train.py, after train or infer
+          res = np.array(scope.find_var(global_cnt.name).get_tensor())
+          print("sum array: ", paddle.fleet.sum(res))
+    """
+    fleet._role_maker._barrier_worker()
+    if scope is None:
+        scope = fluid.global_scope()
+    if isinstance(input, Variable):
+        input = np.array(scope.find_var(input.name).get_tensor())
+    elif isinstance(input, str):
+        input = np.array(scope.find_var(input).get_tensor())
+    old_shape = np.array(input.shape)
+    output = np.copy(input) * 0
+    fleet._role_maker._all_reduce(input, output, mode="sum")
+    output = output.reshape(old_shape)
+    return output
+
+
+def max(input, scope=None):
+    """
+    distributed max in fleet
+
+    Args:
+        input(numpy.array|Variable|string): output of a layer
+        scope(Scope): specific scope
+
+    Returns:
+        global_metric(numpy.array): max array
+
+    Example:
+        .. code-block:: python
+
+          # in model.py
+          input = fluid.layers.cast(some_input, dtype='float32')
+          cnt = fluid.layers.reduce_sum(input)
+          global_cnt = fluid.layers.create_global_var(persistable=True, dtype='float32', shape=[1], value=0)
+          tmp = fluid.layers.elementwise_max(cnt, global_cnt)
+          fluid.layers.assign(tmp, global_cnt)
+
+          # in train.py, after train or infer
+          res = np.array(scope.find_var(global_cnt.name).get_tensor())
+          print("max array: ", paddle.fleet.max(res))
+    """
+    fleet._role_maker._barrier_worker()
+    if scope is None:
+        scope = fluid.global_scope()
+    if isinstance(input, Variable):
+        input = np.array(scope.find_var(input.name).get_tensor())
+    elif isinstance(input, str):
+        input = np.array(scope.find_var(input).get_tensor())
+    old_shape = np.array(input.shape)
+    output = np.copy(input) * 0
+    fleet._role_maker._all_reduce(input, output, mode="max")
+    output = output.reshape(old_shape)
+    return output
+
+
+def min(input, scope=None):
+    """
+    distributed min in fleet
+
+    Args:
+        input(numpy.array|Variable|string): output of a layer
+        scope(Scope): specific scope
+
+    Returns:
+        global_metric(numpy.array): min array
+
+    Example:
+        .. code-block:: python
+
+          # in model.py
+          input = fluid.layers.cast(some_input, dtype='float32')
+          cnt = fluid.layers.reduce_sum(input)
+          global_cnt = fluid.layers.create_global_var(persistable=True, dtype='float32', shape=[1], value=0)
+          tmp = fluid.layers.elementwise_min(cnt, global_cnt)
+          fluid.layers.assign(tmp, global_cnt)
+
+          # in train.py, after train or infer
+          res = np.array(scope.find_var(global_cnt.name).get_tensor())
+          print("min array: ", paddle.fleet.min(res))
+    """
+    fleet._role_maker._barrier_worker()
+    if scope is None:
+        scope = fluid.global_scope()
+    if isinstance(input, Variable):
+        input = np.array(scope.find_var(input.name).get_tensor())
+    elif isinstance(input, str):
+        input = np.array(scope.find_var(input).get_tensor())
+    old_shape = np.array(input.shape)
+    output = np.copy(input) * 0
+    fleet._role_maker._all_reduce(input, output, mode="min")
+    output = output.reshape(old_shape)
+    return output
+
+
+def auc(stat_pos, stat_neg, scope=None):
+    """
+    distributed auc in fleet
+
+    Args:
+        stat_pos(numpy.array|Variable|string): stat_pos in output of fluid.layers.auc
+        stat_neg(numpy.array|Variable|string): stat_neg in output of fluid.layers.auc
+        scope(Scope): specific scope
+
+    Returns:
+        auc_value(float): auc value
+
+    Example:
+        .. code-block:: python
+
+          # in model.py
+          similarity_norm = fluid.layers.sigmoid(fluid.layers.clip(output, min=-15.0, max=15.0))
+          binary_predict = fluid.layers.concat(
+              input=[fluid.layers.elementwise_sub(fluid.layers.ceil(similarity_norm), similarity_norm), similarity_norm], axis=1)
+          self.auc, batch_auc, [batch_stat_pos, batch_stat_neg, stat_pos, stat_neg] =
+              fluid.layers.auc(input=binary_predict, label=label, curve='ROC', num_thresholds=4096)
+
+          # in train.py, after train or infer
+          pos = np.array(scope.find_var(stat_pos.name).get_tensor())
+          neg = np.array(scope.find_var(stat_neg.name).get_tensor())
+          print("auc: ", paddle.fleet.auc(pos, neg))
+    """
+    fleet._role_maker._barrier_worker()
+    if scope is None:
+        scope = fluid.global_scope()
+    if isinstance(stat_pos, Variable):
+        stat_pos = np.array(scope.find_var(stat_pos.name).get_tensor())
+    elif isinstance(stat_pos, str):
+        stat_pos = np.array(scope.find_var(stat_pos).get_tensor())
+    if isinstance(stat_neg, Variable):
+        stat_neg = np.array(scope.find_var(stat_neg.name).get_tensor())
+    elif isinstance(stat_neg, str):
+        stat_neg = np.array(scope.find_var(stat_neg).get_tensor())
+    # auc pos bucket shape
+    old_pos_shape = np.array(stat_pos.shape)
+    # reshape to one dim
+    stat_pos = stat_pos.reshape(-1)
+    global_pos = np.copy(stat_pos) * 0
+    # mpi allreduce
+    fleet._role_maker._all_reduce(stat_pos, global_pos)
+    # reshape to its original shape
+    global_pos = global_pos.reshape(old_pos_shape)
+
+    # auc neg bucket
+    old_neg_shape = np.array(stat_neg.shape)
+    stat_neg = stat_neg.reshape(-1)
+    global_neg = np.copy(stat_neg) * 0
+    fleet._role_maker._all_reduce(stat_neg, global_neg)
+    global_neg = global_neg.reshape(old_neg_shape)
+
+    # calculate auc
+    num_bucket = len(global_pos[0])
+    area = 0.0
+    pos = 0.0
+    neg = 0.0
+    new_pos = 0.0
+    new_neg = 0.0
+    total_ins_num = 0
+    for i in range(num_bucket):
+        index = num_bucket - 1 - i
+        new_pos = pos + global_pos[0][index]
+        total_ins_num += global_pos[0][index]
+        new_neg = neg + global_neg[0][index]
+        total_ins_num += global_neg[0][index]
+        area += (new_neg - neg) * (pos + new_pos) / 2
+        pos = new_pos
+        neg = new_neg
+
+    auc_value = None
+    if pos * neg == 0 or total_ins_num == 0:
+        auc_value = 0.5
+    else:
+        auc_value = area / (pos * neg)
+
+    fleet._role_maker._barrier_worker()
+    return auc_value
+
+
+def mae(abserr, total_ins_num, scope=None):
+    """
+    distributed mae in fleet
+
+    Args:
+        abserr(numpy.array|Variable|string): abserr in output of fluid.contrib.layers.ctr_metric_bundle
+        total_ins_num(int|float): total train/infer instance count
+        scope(Scope): specific scope
+
+    Returns:
+        mae(float): mae value
+
+    Example:
+        .. code-block:: python
+
+          # in model.py
+          sqrerr, abserr, prob, q, pos, total = fluid.contrib.layers.ctr_metric_bundle(similarity_norm, fluid.layers.cast(x=label, dtype='float32'))
+
+          # in train.py, after train or infer
+          res = np.array(scope.find_var(abserr.name).get_tensor())
+          print("mae: ", paddle.fleet.mae(res, total_ins_num))
+    """
+    fleet._role_maker._barrier_worker()
+    if scope is None:
+        scope = fluid.global_scope()
+    if isinstance(abserr, Variable):
+        abserr = np.array(scope.find_var(abserr.name).get_tensor())
+    elif isinstance(abserr, str):
+        abserr = np.array(scope.find_var(abserr).get_tensor())
+    old_metric_shape = np.array(abserr.shape)
+    abserr = abserr.reshape(-1)
+    global_metric = np.copy(abserr) * 0
+    fleet._role_maker._all_reduce(abserr, global_metric)
+    global_metric = global_metric.reshape(old_metric_shape)
+    mae_value = global_metric[0] / total_ins_num
+    return mae_value
+
+
+def rmse(sqrerr, total_ins_num, scope=None):
+    """
+    distributed rmse in fleet
+
+    Args:
+        sqrerr(numpy.array|Variable|string): sqrerr in output of fluid.contrib.layers.ctr_metric_bundle
+        total_ins_num(int|float): total train/infer instance count
+        scope(Scope): specific scope
+
+    Returns:
+        rmse(float): rmse value
+
+    Example:
+        .. code-block:: python
+
+          # in model.py
+          sqrerr, abserr, prob, q, pos, total = fluid.contrib.layers.ctr_metric_bundle(similarity_norm, fluid.layers.cast(x=label, dtype='float32'))
+
+          # in train.py, after train or infer
+          res = np.array(scope.find_var(sqrerr.name).get_tensor())
+          print("rmse: ", paddle.fleet.rmse(res, total_ins_num))
+    """
+    fleet._role_maker._barrier_worker()
+    if scope is None:
+        scope = fluid.global_scope()
+    if isinstance(sqrerr, Variable):
+        sqrerr = np.array(scope.find_var(sqrerr.name).get_tensor())
+    elif isinstance(sqrerr, str):
+        sqrerr = np.array(scope.find_var(sqrerr).get_tensor())
+    old_metric_shape = np.array(sqrerr.shape)
+    sqrerr = sqrerr.reshape(-1)
+    global_metric = np.copy(sqrerr) * 0
+    fleet._role_maker._all_reduce(sqrerr, global_metric)
+    global_metric = global_metric.reshape(old_metric_shape)
+    rmse_value = math.sqrt(global_metric[0] / total_ins_num)
+    return rmse_value
+
+
+def mse(sqrerr, total_ins_num, scope=None):
+    """
+    distributed mse in fleet
+
+    Args:
+        sqrerr(numpy.array|Variable|string): sqrerr in output of fluid.contrib.layers.ctr_metric_bundle
+        total_ins_num(int|float): total train/infer instance count
+        scope(Scope): specific scope
+
+    Returns:
+        mse(float): mse value
+
+    Example:
+        .. code-block:: python
+
+          # in model.py
+          sqrerr, abserr, prob, q, pos, total = fluid.contrib.layers.ctr_metric_bundle(similarity_norm, fluid.layers.cast(x=label, dtype='float32'))
+
+          # in train.py, after train or infer
+          metric = np.array(scope.find_var(sqrerr.name).get_tensor())
+          print("mse: ", paddle.fleet.mse(metric, total_ins_num))
+    """
+    fleet._role_maker._barrier_worker()
+    if scope is None:
+        scope = fluid.global_scope()
+    if isinstance(sqrerr, Variable):
+        sqrerr = np.array(scope.find_var(sqrerr.name).get_tensor())
+    elif isinstance(sqrerr, str):
+        sqrerr = np.array(scope.find_var(sqrerr).get_tensor())
+    old_metric_shape = np.array(sqrerr.shape)
+    sqrerr = sqrerr.reshape(-1)
+    global_metric = np.copy(sqrerr) * 0
+    fleet._role_maker._all_reduce(sqrerr, global_metric)
+    global_metric = global_metric.reshape(old_metric_shape)
+    mse_value = global_metric[0] / total_ins_num
+    return mse_value
+
+
+def acc(correct, total, scope=None):
+    """
+    distributed accuracy in fleet
+
+    Args:
+        correct(numpy.array|Variable|string): correct Variable
+        total(numpy.array|Variable): total Variable
+        scope(Scope): specific scope
+
+    Returns:
+        acc(float): accuracy value
+
+    Example:
+        .. code-block:: python
+
+          # in model.py
+          correct = fluid.layers.create_global_var(dtype='float32', shape=[1], value=0)
+          total = fluid.layers.create_global_var(dtype='float32', shape=[1], value=0)
+          acc = fluid.layers.acc(predict, label, k=1, correct=correct, total=total)
+
+          global_correct = fluid.layers.create_global_var(persistable=True, dtype='float32', shape=[1], value=0)
+          tmp1 = fluid.layers.elementwise_min(correct, global_correct)
+          fluid.layers.assign(tmp1, global_correct)
+
+          global_total = fluid.layers.create_global_var(persistable=True, dtype='float32', shape=[1], value=0)
+          tmp2 = fluid.layers.elementwise_min(total, global_total)
+          fluid.layers.assign(tmp2, global_total)
+
+          # in train.py, after train or infer
+          correct_num = np.array(scope.find_var(correct.name).get_tensor())
+          total_num = np.array(scope.find_var(total.name).get_tensor())
+          print("accuracy: ", paddle.fleet.acc(correct_num, total_num))
+    """
+    fleet._role_maker._barrier_worker()
+    if scope is None:
+        scope = fluid.global_scope()
+    if isinstance(correct, Variable):
+        correct = np.array(scope.find_var(correct.name).get_tensor())
+    elif isinstance(correct, str):
+        correct = np.array(scope.find_var(correct).get_tensor())
+    if isinstance(total, Variable):
+        total = np.array(scope.find_var(total.name).get_tensor())
+    elif isinstance(total, str):
+        total = np.array(scope.find_var(total).get_tensor())
+    global_correct_num = np.copy(correct) * 0
+    global_total_num = np.copy(total) * 0
+    fleet._role_maker._all_reduce(correct, global_correct_num)
+    fleet._role_maker._all_reduce(total, global_total_num)
+    return float(global_correct_num[0]) / float(global_total_num[0])
diff --git a/python/paddle/fluid/tests/unittests/test_fleet_metric.py b/python/paddle/fluid/tests/unittests/test_fleet_metric.py
new file mode 100644
index 0000000000000000000000000000000000000000..6e5feece93fc5725bb5e49fa62daa7a22c1a6392
--- /dev/null
+++ b/python/paddle/fluid/tests/unittests/test_fleet_metric.py
@@ -0,0 +1,113 @@
+#   Copyright (c) 2020 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.
+"""Test fleet metric."""
+
+from __future__ import print_function
+import numpy as np
+import paddle
+import paddle.fluid as fluid
+import os
+import unittest
+import paddle.fleet.metrics.metric as metric
+from paddle.fluid.incubate.fleet.base.role_maker import GeneralRoleMaker
+from paddle.fluid.incubate.fleet.parameter_server.pslib import fleet as fleet
+
+
+class TestFleetMetric(unittest.TestCase):
+    """Test cases for fleet metric."""
+
+    def setUp(self):
+        """Set up, set envs."""
+
+        class FakeFleet:
+            """Fake fleet only for test."""
+
+            def __init__(self):
+                """Init."""
+                self.gloo = fluid.core.Gloo()
+                self.gloo.set_rank(0)
+                self.gloo.set_size(1)
+                self.gloo.set_prefix("123")
+                self.gloo.set_iface("lo")
+                self.gloo.set_hdfs_store("./tmp_test_metric", "", "")
+                self.gloo.init()
+
+            def _all_reduce(self, input, output, mode="sum"):
+                """All reduce using gloo."""
+                input_list = [i for i in input]
+                ans = self.gloo.all_reduce(input_list, mode)
+                for i in range(len(ans)):
+                    output[i] = 1
+
+            def _barrier_worker(self):
+                """Fake barrier worker, do nothing."""
+                pass
+
+        self.fleet = FakeFleet()
+        fleet._role_maker = self.fleet
+
+    def test_metric_1(self):
+        """Test cases for metrics."""
+        train = fluid.Program()
+        startup = fluid.Program()
+        with fluid.program_guard(train, startup):
+            t = fluid.layers.create_global_var(
+                shape=[1, 1],
+                value=1,
+                dtype='int64',
+                persistable=True,
+                force_cpu=True)
+            t1 = fluid.layers.create_global_var(
+                shape=[1, 1],
+                value=1,
+                dtype='int64',
+                persistable=True,
+                force_cpu=True)
+        place = fluid.CPUPlace()
+        exe = fluid.Executor(place)
+        scope = fluid.Scope()
+        with fluid.scope_guard(scope):
+            exe.run(startup)
+            metric.sum(t, scope)
+            metric.max(t, scope)
+            metric.min(t, scope)
+            metric.auc(t, t1, scope)
+            metric.mae(t1, 3, scope)
+            metric.rmse(t1, 3, scope)
+            metric.mse(t1, 3, scope)
+            metric.acc(t, t1, scope)
+            metric.sum(str(t.name), scope)
+            metric.max(str(t.name), scope)
+            metric.min(str(t.name), scope)
+            metric.auc(str(t1.name), str(t.name), scope)
+            metric.mae(str(t1.name), 3, scope)
+            metric.rmse(str(t1.name), 3, scope)
+            metric.mse(str(t1.name), 3, scope)
+            metric.acc(str(t.name), str(t1.name), scope)
+        arr = np.array([1, 2, 3, 4])
+        metric.sum(arr)
+        metric.max(arr)
+        metric.min(arr)
+        arr1 = np.array([[1, 2, 3, 4]])
+        arr2 = np.array([[1, 2, 3, 4]])
+        arr3 = np.array([1, 2, 3, 4])
+        metric.auc(arr1, arr2)
+        metric.mae(arr, 3)
+        metric.rmse(arr, 3)
+        metric.mse(arr, 3)
+        metric.acc(arr, arr3)
+
+
+if __name__ == "__main__":
+    unittest.main()