diff --git a/doc/source/command-objects/command.rst b/doc/source/command-objects/command.rst
index 34c07da625..918fd959ad 100644
--- a/doc/source/command-objects/command.rst
+++ b/doc/source/command-objects/command.rst
@@ -15,3 +15,9 @@ List recognized commands by group
 .. code:: bash
 
     openstack command list
+        [--group <group-keyword>]
+
+.. option:: --group <group-keyword>
+
+    Show commands filtered by a command group, for example: identity, volume,
+    compute, image, network and other keywords
diff --git a/openstackclient/common/module.py b/openstackclient/common/module.py
index ba911ecb8f..20497f2131 100644
--- a/openstackclient/common/module.py
+++ b/openstackclient/common/module.py
@@ -29,12 +29,26 @@ class ListCommand(command.Lister):
 
     auth_required = False
 
+    def get_parser(self, prog_name):
+        parser = super(ListCommand, self).get_parser(prog_name)
+        parser.add_argument(
+            '--group',
+            metavar='<group-keyword>',
+            help=_('Show commands filtered by a command group, for example: '
+                   'identity, volume, compute, image, network and '
+                   'other keywords'),
+        )
+        return parser
+
     def take_action(self, parsed_args):
         cm = self.app.command_manager
         groups = cm.get_command_groups()
         groups = sorted(groups)
         columns = ('Command Group', 'Commands')
 
+        if parsed_args.group:
+            groups = (group for group in groups if parsed_args.group in group)
+
         commands = []
         for group in groups:
             command_names = cm.get_command_names(group)
diff --git a/openstackclient/tests/functional/common/test_module.py b/openstackclient/tests/functional/common/test_module.py
index f4f2e95215..e9e4ee3a6f 100644
--- a/openstackclient/tests/functional/common/test_module.py
+++ b/openstackclient/tests/functional/common/test_module.py
@@ -42,3 +42,38 @@ class ModuleTest(base.TestCase):
         cmd_output = json.loads(self.openstack('module list --all -f json'))
         for one_module in self.CLIENTS + self.LIBS:
             self.assertIn(one_module, cmd_output.keys())
+
+
+class CommandTest(base.TestCase):
+    """Functional tests for openstackclient command list."""
+    GROUPS = [
+        'openstack.volume.v2',
+        'openstack.network.v2',
+        'openstack.image.v2',
+        'openstack.identity.v3',
+        'openstack.compute.v2',
+        'openstack.common',
+        'openstack.cli',
+    ]
+
+    def test_command_list_no_option(self):
+        cmd_output = json.loads(self.openstack('command list -f json'))
+        group_names = [each.get('Command Group') for each in cmd_output]
+        for one_group in self.GROUPS:
+            self.assertIn(one_group, group_names)
+
+    def test_command_list_with_group(self):
+        input_groups = [
+            'volume',
+            'network',
+            'image',
+            'identity',
+            'compute.v2'
+        ]
+        for each_input in input_groups:
+            cmd_output = json.loads(self.openstack(
+                'command list --group %s -f json' % each_input
+            ))
+            group_names = [each.get('Command Group') for each in cmd_output]
+            for each_name in group_names:
+                self.assertIn(each_input, each_name)
diff --git a/openstackclient/tests/unit/common/test_module.py b/openstackclient/tests/unit/common/test_module.py
index 4b586d3b2d..2491d63965 100644
--- a/openstackclient/tests/unit/common/test_module.py
+++ b/openstackclient/tests/unit/common/test_module.py
@@ -88,6 +88,41 @@ class TestCommandList(utils.TestCommand):
 
         self.assertEqual(datalist, tuple(data))
 
+    def test_command_list_with_group_not_found(self):
+        arglist = [
+            '--group', 'not_exist',
+        ]
+        verifylist = [
+            ('group', 'not_exist'),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        columns, data = self.cmd.take_action(parsed_args)
+
+        collist = ('Command Group', 'Commands')
+        self.assertEqual(collist, columns)
+        self.assertEqual([], data)
+
+    def test_command_list_with_group(self):
+        arglist = [
+            '--group', 'common',
+        ]
+        verifylist = [
+            ('group', 'common'),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        columns, data = self.cmd.take_action(parsed_args)
+
+        collist = ('Command Group', 'Commands')
+        self.assertEqual(collist, columns)
+        datalist = ((
+            'openstack.common',
+            'limits show\nextension list'
+        ),)
+
+        self.assertEqual(datalist, tuple(data))
+
 
 @mock.patch.dict(
     'openstackclient.common.module.sys.modules',
diff --git a/releasenotes/notes/bug-1666780-c10010e9061689d3.yaml b/releasenotes/notes/bug-1666780-c10010e9061689d3.yaml
new file mode 100644
index 0000000000..952a1f7a95
--- /dev/null
+++ b/releasenotes/notes/bug-1666780-c10010e9061689d3.yaml
@@ -0,0 +1,11 @@
+---
+features:
+  - |
+    Support list commands by group name keyword. Add ``--group`` option to
+    filter the commands by group name keyword, like: --group volume, list all
+    openstack.volume.v2 (cinder) commands.
+    That support the scenario that users need to know the current support
+    commands of some OpenStack services(nova, neutron, cinder and so on) in
+    OSC, and make it easier for users to find out the related commands that
+    they care about.
+    [Bug `1666780 <https://bugs.launchpad.net/python-openstackclient/+bug/1666780>`_]