Traditional Chinese medicine has always attached great importance to the relationship between health and longevity and the natural world, believing that temperature, humidity, wind and sunshine time have an important relationship with external diseases. Modern medicine also proves that climate change in different seasons can have certain effects on the physiological functions of the human body and the nature, development and regression of diseases. It is an important principle of TCM health science to “maintain health according to the time of the year”. The Yellow Emperor’s Classic of Internal Medicine says: “Therefore, the wise man must follow the four seasons and avoid the cold and the heat”. In Chinese medicine, it is also said that “spring and summer nourish Yin, autumn and winter nourish Yang”. All of these explain that the human body must follow the natural changes of the four seasons and health, so as to strengthen the body’s ability to adapt to the seasons and climate change, in order to ensure good health and reduce the occurrence of disease. The four seasons of the year are warm in spring, hot in summer, cool in autumn and cold in winter. The changes in climate will bring different degrees of impact on the human body. Therefore, the nutritional structure of the body should be coordinated with the changes of the seasons, pay attention to the scientific diet and dietary supplements for each season, and arrange the diet reasonably. In spring, it is advisable to eat light food; in summer, it is advisable to eat sweet and cool food; in autumn, it is advisable to eat hot and dry food; in winter, it is advisable to eat warm food. The diet is in accordance with the four seasons, which can maintain the body’s yin and yang qi and blood, so that the righteousness within the evil can not invade. For the elderly, due to the reduction of physiological functions, the ability to adapt to the changing climate of the four seasons is weakened, the scientific arrangement of the four seasons diet, it is more important.