Abstract: This article investigates the display, layout and decoration of the Tibetan Buddhism Temple-Zhengjue Temple in Qing Royal garden-Yuanmingyuan based on deducing documentary materials in Qing Dynasty and the local chronicles-Chengfucunzhi in the period of the Republic of China. The paper interprets its religion connotation, and expounds Lama in this temple and their Buddhist activities. Then the article reveals that this temple played a siginificant role in dealing with the relations between Qing Court and Mongol and Tibet, and consolidating the unified nation of multi ethnic groups.