Health care, also known as health care, moral education, nourishing nature, hygiene, health protection, longevity and so on. The so-called life is life, survival and growth; The so-called maintenance means maintenance, recuperation and nourishing. In a word, keeping in good health is to maintain life. Four-season health care, that is, four-season health care, refers to adapting to the seasonal changes in nature, and achieving the goal of health and longevity through nursed back to health. As for the relationship between health preservation and health and longevity, it was pointed out in Huangdi Neijing more than 2,000 years ago: "Ancient people, those who know, live in harmony with Yin and Yang, and do not rush, so they can live in harmony with God and die at the age of 100." According to the different climatic characteristics of the four seasons, the book also puts forward the corresponding rules of health preservation, which lays a profound theoretical foundation for the theory of health preservation of the four seasons. Later generations of physicians inherited and developed the theory of four-season health preservation, which played an important role in promoting people's health and longevity. In the 2 1 century, with the rapid development of society and the accelerated pace of life, four-season health preservation, as an important part of China's traditional health preservation, will certainly play an irreplaceable role in regulating people's mentality, delaying people's aging and prolonging people's life. (1) The four seasons are closely related to human health. Chinese medical theory especially emphasizes the importance of meteorological factors in prevention and health care. For example, in Huangdi Neijing, it is recorded that "you must be old first, and you don't have to cut the sky", that is, you must first understand the weather changes in a year before you treat a disease. In preventive health care, you must fully consider the changes of meteorological factors, seasons and solar terms in order to conform to the laws of nature and achieve the purpose of strengthening the body, eliminating diseases and prolonging life. (II) Connotation of Four Seasons Health Care TCM health care is the crystallization of doctors' experience for thousands of years. Judging from the contents and methods involved, it can be said that it is rich in information, well documented, effective and simple. With the upsurge of "returning to nature", the "integrity and naturalness" characteristics of TCM health preservation will show great vitality. The theories and methods of TCM health preservation are extremely rich, and one of the important core contents is timely health preservation. As Huangdi Neijing said: "Therefore, the health of the wise must be suitable for cold and summer." It is an extremely important principle in TCM health preservation, and it can also be said to be a magic weapon to prolong life. Four-season health care refers to nursed back to health according to the laws and characteristics of yin and yang changes in climate throughout the year, so as to achieve the purpose of health care and longevity. The changes of cold, hot and cool in spring, summer, autumn and winter are formed by the ups and downs of yin and yang in a year. The solstice in winter brings the sun. From spring to summer, the sun grows and the yin disappears, so there is the temperature in spring and the heat in summer. It is cloudy from summer to day. From autumn to winter, the shade grows and the yang disappears, so it is cool in autumn and cold in winter. As a part of nature, human beings can't live without objective natural conditions, but should adapt to the changes of the four seasons to adjust the human body, so as to achieve the health care purposes of balance of yin and yang, coordination of viscera, qi and blood filling, access to meridians, and good mood.