The Daoist Temple“San-qing Palace” lies in front of the Mogao Caves, its popular name is“Xia-si, Lower Temple”, which was built by Wang Yuanlu, a famous Daoist monk in 1906 - 1908. Wang was the master of the Temple and the Library Cave of the Dunhuang Mogao Caves. Recently, few historical cultural relics was found when the temple was repaired, which provides with new evidences for the study of Dunhuang history and culture.