Only when people's life activities conform to the laws of nature can people live a long life. The Taoist health preserving theory is based on the Taoist thoughts of Laozi and Zhuangzi, guided by the theories of Taiji Bagua and Yin-Yang and Five Elements, and achieves the goal of harmonious and healthy body and mind by regulating Yin-Yang, harmonizing qi and blood and preserving spirit. Starting from maintaining people's normal state, it takes reducing consumption, strengthening regeneration and maintaining patency and stability as important links.