Medicine is a science that deals with the problems related to the good state of human physiology in the definition of human health, aiming at treating and preventing physiological diseases and improving the level of human physiological health. Medicine in a narrow sense is only the treatment of diseases and the recovery of effective body functions, while medicine in a broad sense also includes China's regimen and western nutrition derived from it. There are two major medical systems in the world: western micro-western medicine and eastern macro-Chinese medicine.

The scientific nature of medicine lies in the application of basic medical theories, such as biochemistry, physiology, microbiology, anatomy, pathology, pharmacology, statistics, epidemiology, traditional Chinese medicine and Chinese medicine skills, to treat diseases and promote health.

Although the different ways of thinking between the East and the West lead to different macro-and micro-order of studying the relationship between human health and the outside world and pathological mechanism, in the near future, the accumulation of rich experience in the practice of Chinese and Western medicine and the formation of theories will certainly give birth to a new medicine, that is, human medicine.