diff --git a/paddleaudio/paddleaudio/compliance/__init__.py b/paddleaudio/paddleaudio/compliance/__init__.py
index 97043fd7ba6..c08f9ab11ea 100644
--- a/paddleaudio/paddleaudio/compliance/__init__.py
+++ b/paddleaudio/paddleaudio/compliance/__init__.py
@@ -11,3 +11,5 @@
 # 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 . import kaldi
+from . import librosa
diff --git a/paddleaudio/tests/features/__init__.py b/paddleaudio/tests/features/__init__.py
new file mode 100644
index 00000000000..97043fd7ba6
--- /dev/null
+++ b/paddleaudio/tests/features/__init__.py
@@ -0,0 +1,13 @@
+# 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.
diff --git a/paddleaudio/tests/features/base.py b/paddleaudio/tests/features/base.py
new file mode 100644
index 00000000000..f3012e43183
--- /dev/null
+++ b/paddleaudio/tests/features/base.py
@@ -0,0 +1,47 @@
+# 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 os
+import unittest
+
+import numpy as np
+import paddle
+
+from paddleaudio import load
+
+file_dir = os.path.dirname(os.path.realpath(__file__))
+
+
+class FeatTest(unittest.TestCase):
+    def setUp(self):
+        self.initParmas()
+        self.initWavInput()
+        self.setUpDevice()
+
+    def setUpDevice(self, device='cpu'):
+        paddle.set_device(device)
+
+    def initWavInput(self):
+        self.waveform, self.sr = load(
+            os.path.abspath(os.path.join(file_dir, '../wav/zh.wav')))
+        self.waveform = self.waveform.astype(
+            np.float32
+        )  # paddlespeech.s2t.transform.spectrogram only supports float32 
+        dim = len(self.waveform.shape)
+
+        assert dim in [1, 2]
+        if dim == 1:
+            self.waveform = np.expand_dims(self.waveform, 0)
+
+    def initParmas(self):
+        raise NotImplementedError
diff --git a/paddleaudio/tests/features/istft.py b/paddleaudio/tests/features/istft.py
new file mode 100644
index 00000000000..2d9097c7338
--- /dev/null
+++ b/paddleaudio/tests/features/istft.py
@@ -0,0 +1,49 @@
+# 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 numpy as np
+import paddle
+
+from .base import FeatTest
+from paddleaudio.functional.window import get_window
+from paddlespeech.s2t.transform.spectrogram import IStft
+from paddlespeech.s2t.transform.spectrogram import Stft
+
+
+class ISTFT(FeatTest):
+    def initParmas(self):
+        self.n_fft = 512
+        self.hop_length = 128
+        self.window_str = 'hann'
+
+    def test_istft(self):
+        ps_stft = Stft(self.n_fft, self.hop_length)
+        ps_res = ps_stft(
+            self.waveform.T).squeeze(1).T  # (n_fft//2 + 1, n_frmaes)
+        x = paddle.to_tensor(ps_res)
+
+        ps_istft = IStft(self.hop_length)
+        ps_res = ps_istft(ps_res.T)
+
+        window = get_window(
+            self.window_str, self.n_fft, dtype=self.waveform.dtype)
+        pd_res = paddle.signal.istft(
+            x, self.n_fft, self.hop_length, window=window)
+
+        np.testing.assert_array_almost_equal(ps_res, pd_res, decimal=5)
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/paddleaudio/tests/features/log_melspectrogram.py b/paddleaudio/tests/features/log_melspectrogram.py
new file mode 100644
index 00000000000..ee54f5db1ed
--- /dev/null
+++ b/paddleaudio/tests/features/log_melspectrogram.py
@@ -0,0 +1,50 @@
+# 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 numpy as np
+import paddle
+
+import paddleaudio
+from .base import FeatTest
+from paddlespeech.s2t.transform.spectrogram import LogMelSpectrogram
+
+
+class LogMelSpect(FeatTest):
+    def initParmas(self):
+        self.n_fft = 512
+        self.hop_length = 128
+        self.n_mels = 40
+
+    def test_log_melspect(self):
+        ps_melspect = LogMelSpectrogram(self.sr, self.n_mels, self.n_fft,
+                                        self.hop_length)
+        ps_res = ps_melspect(self.waveform.T).squeeze(1).T
+
+        x = paddle.to_tensor(self.waveform)
+        # paddlespeech.s2t的特征存在幅度谱和功率谱滥用的情况
+        ps_melspect = paddleaudio.features.LogMelSpectrogram(
+            self.sr,
+            self.n_fft,
+            self.hop_length,
+            power=1.0,
+            n_mels=self.n_mels,
+            f_min=0.0)
+        pa_res = (ps_melspect(x) / 10.0).squeeze(0).numpy()
+
+        np.testing.assert_array_almost_equal(ps_res, pa_res, decimal=5)
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/paddleaudio/tests/features/spectrogram.py b/paddleaudio/tests/features/spectrogram.py
new file mode 100644
index 00000000000..da71d639735
--- /dev/null
+++ b/paddleaudio/tests/features/spectrogram.py
@@ -0,0 +1,42 @@
+# 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 numpy as np
+import paddle
+
+import paddleaudio
+from .base import FeatTest
+from paddlespeech.s2t.transform.spectrogram import Spectrogram
+
+
+class Spect(FeatTest):
+    def initParmas(self):
+        self.n_fft = 512
+        self.hop_length = 128
+
+    def test_spectrogram(self):
+        ps_spect = Spectrogram(self.n_fft, self.hop_length)
+        ps_res = ps_spect(self.waveform.T).squeeze(1).T  # Magnitude
+
+        x = paddle.to_tensor(self.waveform)
+        pa_spect = paddleaudio.features.Spectrogram(
+            self.n_fft, self.hop_length, power=1.0)
+        pa_res = pa_spect(x).squeeze(0).numpy()
+
+        np.testing.assert_array_almost_equal(ps_res, pa_res, decimal=5)
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/paddleaudio/tests/features/stft.py b/paddleaudio/tests/features/stft.py
new file mode 100644
index 00000000000..352d6dfa117
--- /dev/null
+++ b/paddleaudio/tests/features/stft.py
@@ -0,0 +1,44 @@
+# 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 numpy as np
+import paddle
+
+from .base import FeatTest
+from paddleaudio.functional.window import get_window
+from paddlespeech.s2t.transform.spectrogram import Stft
+
+
+class STFT(FeatTest):
+    def initParmas(self):
+        self.n_fft = 512
+        self.hop_length = 128
+        self.window_str = 'hann'
+
+    def test_stft(self):
+        ps_stft = Stft(self.n_fft, self.hop_length)
+        ps_res = ps_stft(
+            self.waveform.T).squeeze(1).T  # (n_fft//2 + 1, n_frmaes)
+
+        x = paddle.to_tensor(self.waveform)
+        window = get_window(self.window_str, self.n_fft, dtype=x.dtype)
+        pd_res = paddle.signal.stft(
+            x, self.n_fft, self.hop_length, window=window).squeeze(0).numpy()
+
+        np.testing.assert_array_almost_equal(ps_res, pd_res, decimal=5)
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/paddleaudio/tests/wav/zh.wav b/paddleaudio/tests/wav/zh.wav
new file mode 100644
index 00000000000..7534f624c04
Binary files /dev/null and b/paddleaudio/tests/wav/zh.wav differ
diff --git a/paddlespeech/s2t/__init__.py b/paddlespeech/s2t/__init__.py
index 855ceef96f5..28afb33978d 100644
--- a/paddlespeech/s2t/__init__.py
+++ b/paddlespeech/s2t/__init__.py
@@ -21,6 +21,7 @@
 from paddle.fluid import core
 from paddle.nn import functional as F
 
+from . import transform
 from paddlespeech.s2t.utils.log import Log
 
 #TODO(Hui Zhang): remove  fluid import
diff --git a/paddlespeech/s2t/transform/__init__.py b/paddlespeech/s2t/transform/__init__.py
index 185a92b8d94..6ba83616c3d 100644
--- a/paddlespeech/s2t/transform/__init__.py
+++ b/paddlespeech/s2t/transform/__init__.py
@@ -11,3 +11,4 @@
 # 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 . import spectrogram