Mental health and psychotherapy will become the health theme in 2 1 century. Research shows that there is an internal relationship between human psychological activities and their physiological functions. A good emotional state can make the physiological function in the best state. On the contrary, it will reduce or destroy a certain function and cause various diseases.

Being kind to others contributes to health. Pathologists from Yale University in the United States conducted a follow-up survey of more than 7,000 people. The results show that the mortality rate of people who are kind to others is obviously reduced. Love also contributes to health. Psychologists and medical scientists believe that love is the harmony of both sides' thoughts and feelings, and it is a complement in psychological activities. Two kinds of tender feelings of happiness and joy turn this psychology into a physiological reaction, so that both sides secrete some substances that are beneficial to health. On the other hand, mutual antipathy, disgust and even hostility will secrete harmful substances and damage health.

Also, singing and chanting, generosity and indifference to fame and fortune can make people healthy. It can be seen that mental health care is closely related to moral quality, and its connotation is very rich. Mental health preservation is a great leap in human understanding of health.