diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1f91967..406713f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,7 @@ project(gio-qt)
 cmake_minimum_required(VERSION 3.9.5)
 
 option(BUILD_UTILS "Build utilities" ON)
+option(BUILD_DOCS "Build documentation" OFF)
 
 # Version
 if (NOT PROJECT_VERSION)
@@ -29,7 +30,8 @@ include(GNUInstallDirs)
 
 # Find the QtWidgets library
 find_package(Qt5 ${QT_MINIMUM_VERSION} CONFIG REQUIRED Core)
-find_package(PkgConfig)
+find_package(PkgConfig REQUIRED)
+find_package(Doxygen)
 
 pkg_check_modules(GIOMM giomm-2.4) # look into FindPkgConfig.cmake
 
@@ -38,3 +40,32 @@ add_subdirectory (gio-qt)
 if (BUILD_UTILS)
     add_subdirectory(qgio-tools)
 endif()
+
+if (BUILD_DOCS)
+    if (NOT DOXYGEN_FOUND)
+        message(FATAL_ERROR "Doxygen is required to build the documentation.")
+    endif ()
+
+    set (DOXYGEN_GENERATE_HTML YES)
+    set (DOXYGEN_GENERATE_QHP YES)
+    set (DOXYGEN_OUTPUT_DIRECTORY "./docs/")
+    set (DOXYGEN_EXCLUDE_SYMBOLS "*Private;*Test")
+    set (DOXYGEN_QHG_LOCATION "qhelpgenerator")
+    set (DOXYGEN_QHP_NAMESPACE "org.deepin.gio-qt")
+    set (DOXYGEN_QCH_FILE "../gio-qt.qch")
+    set (DOXYGEN_QHP_VIRTUAL_FOLDER "gio-qt")
+
+    doxygen_add_docs(doxygen
+        ${CMAKE_CURRENT_SOURCE_DIR}/gio-qt
+        ALL
+        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/gio-qt
+        COMMENT "Generate documentation via Doxygen"
+    )
+
+    install (DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/html DESTINATION share/doc)
+
+else ()
+    message (STATUS "")
+    message (STATUS "To build docs, please use -DBUILD_DOCS=Yes")
+    message (STATUS "")
+endif()
diff --git a/gio-qt/dgiomountoperation.h b/gio-qt/dgiomountoperation.h
index dc1f583..02db02b 100644
--- a/gio-qt/dgiomountoperation.h
+++ b/gio-qt/dgiomountoperation.h
@@ -13,11 +13,15 @@ enum DGioAskPasswordFlag
 };
 Q_DECLARE_FLAGS(DGioAskPasswordFlags, DGioAskPasswordFlag)
 
+//! Indicated the mount operation result
+/*!
+ *  Wrapper of GMountOperationResult.
+ */
 enum DGioMountOperationResult
 {
-    MOUNT_OPERATION_HANDLED,
-    MOUNT_OPERATION_ABORTED,
-    MOUNT_OPERATION_UNHANDLED
+    MOUNT_OPERATION_HANDLED, /*!< The request was fulfilled and the user specified data is now available */
+    MOUNT_OPERATION_ABORTED, /*!< The user requested the mount operation to be aborted */
+    MOUNT_OPERATION_UNHANDLED /*!< The request was unhandled (i.e. not implemented) */
 };
 Q_ENUMS(DGioMountOperationResult);