Mental health preservation method refers to purifying people's spiritual world, automatically eliminating greed, changing bad personality, correcting wrong cognitive process, adjusting emotions, making their mentality peaceful, optimistic, cheerful and open-minded, so as to achieve the goal of health and longevity. Mental health preservation method is equivalent to the mental health care method of modern medicine. Traditional Chinese medicine believes that God is the master of life activities and can direct the functional activities of human organs and tissues, and puts forward the theory of "the relationship between form and spirit", which holds that human physiological functions are closely related to mental activities, and mental factors can directly affect the functional activities of viscera, yin, yang, qi and blood. If a person is cheerful, cheerful, optimistic about life, peaceful yin and yang, smooth blood and harmonious internal organs, his body will naturally be in a healthy state. On the other hand, bad mental state can directly affect the function of human viscera, resulting in dysfunction of viscera, obstruction of qi and blood circulation, decline of disease resistance, weakness of vital qi and easily lead to various diseases.

Modern medical research has also confirmed that psychological factors have a great influence on physical health. Open-minded and optimistic people have the best neuroendocrine regulation system and normal immune function. People with unhealthy psychology have disordered neuroendocrine function and decreased immune function, and the incidence of diseases is obviously higher. For example, the incidence of hypertension and coronary heart disease in people with impatient behavior A is 2 ~ 3 times higher than that in people with calm behavior B, and the mortality rate is 7 times higher; Emotional depression can also cause a significant decline in human immune function, prone to infectious diseases and tumors. Therefore, mental health preservation is of great significance in the prevention and treatment of psychosomatic diseases.