Emotional health preservation is to study the principles and methods of maintaining and improving physical and mental health under the guidance of the overall concept of traditional Chinese medicine and the theory of form and spirit. Traditional Chinese medicine has always attached importance to physical and mental conditioning, emphasizing the important role of mental conditioning in maintaining and improving human health. "It is important to cultivate the mind, and then to cultivate the shape", that is to say, health care should focus on cultivating the mind. Traditional Chinese medicine's rich thought of emotional health preservation has important theoretical and practical significance.

From the perspective of health, health is the unity of physical health and mental health. A person's physical, psychological, natural and social environment adaptation is in a perfect state, which is considered as real health. Mental health refers to the internal coordination of emotional activities, which can continuously develop a sound personality, improve the quality of life, and maintain exuberant energy and happy mood. "Yin Pingyang is the secret, and the spirit is the rule." "Therefore, I can be in harmony with God, I will come to the end of my life, and I will go to 100 years old." Emphasis is placed on protecting the mind, paying attention to mental health and protecting mental health. It is believed that yin and yang are harmonious and balanced, life is full of vitality, and the body is strong (physical health) and the spirit is vigorous (mental health). If the two are coordinated and unified, they can achieve "unity of form and spirit" and live a long and healthy life.

Traditional Chinese medicine believes that "to restore nothingness ... to hide one's thoughts in one's heart ... idleness, little desire, but peace of mind ... to indulge in lust without disturbing one's mind", "to be in harmony with one's emotions, to be both rigid and flexible" embodies the holistic view of "unity of form and spirit", which includes psychological activities (cognition, emotion, behavior and flexibility), therefore,