diff --git a/docs/readthedocs/source/doc/PythonAPI/Chronos/evaluator.rst b/docs/readthedocs/source/doc/PythonAPI/Chronos/evaluator.rst
new file mode 100644
index 00000000..bee0866d
--- /dev/null
+++ b/docs/readthedocs/source/doc/PythonAPI/Chronos/evaluator.rst
@@ -0,0 +1,10 @@
+Evaluator
+====================================
+
+Evaluator
+------------------------------------
+
+.. automodule:: bigdl.chronos.metric.forecast_metrics
+    :members:
+    :undoc-members:
+    :show-inheritance:
\ No newline at end of file
diff --git a/docs/readthedocs/source/doc/PythonAPI/Chronos/index.rst b/docs/readthedocs/source/doc/PythonAPI/Chronos/index.rst
index 7bfa4faa..eb67d829 100644
--- a/docs/readthedocs/source/doc/PythonAPI/Chronos/index.rst
+++ b/docs/readthedocs/source/doc/PythonAPI/Chronos/index.rst
@@ -10,6 +10,7 @@ Chronos API
     anomaly_detectors.rst
     tsdataset.rst
     simulator.rst
+    evaluator.rst
 
 .. toctree::
     :maxdepth: 1