The development of medicine is continuous and phased. Just as more than 100 years ago, the main goal of medical research was to understand the human body, while the main task in the past 100 years was to understand diseases. In the past two or three decades, basic medical research has developed rapidly, especially genetics, immunology, etc., and has deepened into genetics, proteomics, etc. With the infiltration and promotion of other disciplines, the diagnosis and treatment of clinical medicine has undergone tremendous changes. Detection technology, imaging technology and endoscopy technology have provided new means and ways for doctors to understand diseases and deal with problems. The social and humanistic nature of medicine has brought about problems such as how to adapt to social development and public needs. In order to achieve the purpose of optimizing diagnosis and treatment, safe diagnosis and treatment and economic diagnosis and treatment, the global medical and health system reform has followed.