diff --git a/doc/source/index.rst b/doc/source/index.rst
index a463d27..3bc614c 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -1,8 +1,15 @@
 MapReduce Service
 =================
 
+MapReduce Service (MRS) provides enterprise-level big data clusters on the cloud, which are fully controlled by tenants and support the Hadoop, Spark, HBase, Kafka, and Storm components.
+
+
 .. directive_wrapper::
    :class: container-sbv
 
    .. service_card::
-      :service_type: mrs
\ No newline at end of file
+      :service_type: mrs
+      :umn: This document provides detailed operation guidance of MRS to help you learn and use MRS.
+      :api-ref: This document introduces API reference provided by MRS and describes functions and parameters of each API.
+      :operation-guide: This document describes how to use big data components in MRS to easily run the components for big data analysis and processing.
+      :operation-guide-lts: This document describes how to use the big data components in the MRS cluster of the LTS version to easily run the big data analysis and processing components.
\ No newline at end of file