Since the beginning of human life, when Pan Gu opened the world, everyone wants to live a long and healthy life, be it the kings or the people. The Yellow Emperor’s Classic of Internal Medicine already mentions that kings and common people all want to be in full form. The human body is an extremely complex system, and so far, mankind has not found a solution to all the problems encountered in human health, despite the respective advantages and characteristics of Chinese and Western medicine, neither can solve all the ailments. Balance is fundamental to a long and healthy life. Life lies in balance, and balance is the only way to live a long and healthy life, while imbalance will lead to illness and even death. Confucius’ middle way, Laozi’s Taoist doctrine, Chinese medicine’s yin and yang five elements and the international health declaration proposed and the healthy lifestyle we currently advocate, etc. are all theories of balance. Balance is instant, but balance is eternal. Everyone should strive to achieve balance, which includes nutritional balance, psychological balance, dynamic balance, ecological balance, yin and yang balance, etc. Nutrients are the material basis of life, without them there is no life. In the diet, too much or too little intake and eating the wrong proportion will affect health. Modern people’s diet is often too high in calories and incomplete in nutrients, coupled with too many artificial additives in food, short maturity period of artificially raised animals, nutrient deficiencies, resulting in the lack of many important human nutrients and increased obesity, the body’s metabolic function disorders. In order to balance nutrition, the diet must be reasonable, according to the body’s caloric consumption to determine the caloric intake, that is, “out for in”, so that the body income and expenditure balance. At present, the Ministry of Health advocates a healthy “one, two, one” lifestyle, that is, “walk 10,000 steps a day, eat and move two balanced, healthy for life” is also the reasoning in this regard. The World Health Organization announced that half of health is psychological. Mental balance is the basis of health, 60% of diseases are caused by psychological and mental factors. As the old saying goes, “Everything is a labor of love, a hundred worries shake its heart. Highly intense competition, complex relationships, so that people think too much, not to calm the mind, not only will cause poor sleep, and even affect the body’s neurohumoral regulation and endocrine regulation, and then affect the normal physiological function of the body systems; bad mood, moody, nervous, depressed and frustrated will make people’s immunity is reduced, making the body sick or even lead to the occurrence of cancer, and in serious cases can also be a person Angry death. And cheerful, optimistic, full of confidence, peace of mind, is a dashing life, a long and healthy life, these have been scientifically proven. Therefore, we must pay extra attention to the psychological balance, to eliminate the occurrence of bad emotions, so that health is always in. Movement is absolute, static is relative, everything in the universe is in a dynamic balance of a process. “Water can carry the boat, but also can overturn the boat” is the key to balance, is moderate. Moderate exercise can enhance the function of the heart, brain, lungs, gastrointestinal, neuroendocrine, immune and other organs and systems, of course, excessive exercise can be detrimental to health, and even stroke, sudden death, etc.. The American Medical Association announced that the daily exercise equivalent to 30 minutes of brisk walking people than inactive people reduce mortality by 56%, inactivity has become one of the top ten causes of death or disability worldwide. The principles of moderate exercise are: aerobic exercise, safe and moderate, easy methods, persistent. Moderate exercise also pay attention to master the time of exercise, choose the appropriate exercise program, to maintain an effective amount of exercise. Environmental science believes that in a normal ecosystem, energy flow and material circulation are always ongoing, but at a certain stage, the ratio of energy and material input and output, the composition and number of biological populations are in a relatively stable state, and the transmission of information is smooth, this equilibrium is called ecological balance. Ecological equilibrium is a dynamic balance that can be affected or even destroyed by changes in external and internal factors, especially human factors. The reason why an ecosystem is in balance is that it has the ability to regulate itself internally, or the environment has a self-cleaning capacity for pollutants. However, there is a limit to this. When the environment has too many pollutants and exceeds its self-cleaning capacity, the regulation no longer works, the ecosystem is damaged, and the environment is polluted. Severe environmental pollution, accidents, and natural disasters can cause a crisis in the ecosystem and lead to human disasters. Epidemiological studies prove that 70% to 90% of human diseases are related to the environment. If humans want to live a long and healthy life, they must establish and maintain a harmonious relationship with the external environment. The balance of yin and yang means that the transformation of yin and yang is in harmony, neither too much nor too bad, presenting a harmonious state. The I Ching tells us that the movement of yin and yang is the law of motion of all things. The balance of yin and yang is fundamental to the vitality of life. Under normal circumstances, the body’s own regulatory function can still maintain this state of equilibrium and keep healthy, i.e. “if yin and yang are in balance, the spirit will be cured” (Su Wen – The Treatise on Anger). If the influence of internal and external factors exceeds the body’s adaptability and disrupts the dynamic balance of yin and yang, and the body’s regulatory function cannot immediately eliminate this interference to restore the physiological balance, the body will suffer from yin and yang imbalance, and disease, premature aging, and even death will occur. The meaning of the balance of yin and yang in life is the balance of internal organs, the balance of heat and cold, and the balance of qi and blood. Its general principle is the coordination of yin and yang, the essence of which is the balance of yang and yin essence (essence, blood, fluids and fluid), that is, the coordination of various functions and substances of the human body. Therefore, the purpose of health care is to maintain the balance of yin and yang of life.