Taoism takes Laozi and Zhuangzi as the representative figures, and its theory is based on the view of nature and heaven, paying attention to people themselves, pursuing the liberation of the essence of life and spiritual peace, with special emphasis on spiritual detachment and personality independence, and yearning for the freedom of life. There are four main concepts of health preservation: first, let nature take its course.

Advocating nature is the basic principle of Taoist health preservation. Taoism believes that taking the change of natural order as the law, abandoning human rational factors and taking natural measures in health preservation can keep health and prolong life.

Laozi said: "Man should learn from earth, the earth should learn from heaven, and heaven should learn from Taoism, and Taoism is natural." . He believes that everything in human beings should conform to the laws of nature and not violate the principles of heaven and earth. However, people's initial state is close to nature. Therefore, health care should be simple and true, and the highest standard is to return to the baby state.

Zhuangzi believes that the harmony between man and nature is the highest state of health preservation. He advocates getting rid of all artificial and deliberate pursuits, and thinks that "inaction", "selflessness" and "absolute freedom" are the fundamental ways to realize the unity of man and nature. Second, quiet nothingness.

Laozi advocates simplicity, selfishness and no desire, and rejects all human desires and temptations brought by foreign objects. He advocated rejecting interference through weakness, inaction and self-control, so as to achieve the purpose of returning to nature.

Zhuangzi's health-preserving principles are "discipline yourself by quietness", "keep the spirit, keep the shape and have no desire", "turn a blind eye, listen without hearing, know without reading ……". Third, keep healthy with qi.

"Historical Records" says: "I am in my sixties and twenties, and I am self-cultivating." There is a saying in history that I don't know my final destination. Although I dare not believe it all, the unanimous view of historians is that Laozi is nearly 30 years older than Confucius and died later than Confucius. Confucius lived for 72 years, and Laozi should be regarded as a centenarian.

Laozi's longevity benefits from his way of keeping in good health. Its core is: "I want to be different from others, but I want to eat my mother." This mother-eating is "eating gas." Eating qi is the main method of ancient people's health preservation created by Laozi, and it has also become the gist of qigong practitioners in past dynasties. It has made great contributions to human health.