The meaning of modern health is diverse and extensive, including physical, psychological and social adaptability, among which social adaptability ultimately depends on physical and psychological qualities. Mental health is the spiritual pillar of physical health, and physical health is the material basis of mental health. A good emotional state can make the physiological function in the best state, otherwise it will reduce or destroy some functions and cause diseases.
Health is usually defined as the absence of disease in a given life cycle. The traditional concept of health is "health without disease", but from the perspective of health economics, the modern concept of health is overall health. Overall health involves physiological, psychological and moral factors, and many social and environmental factors will have an important impact on people's health, and health itself is the representative of personal wealth or social wealth and one of the decisive factors of life happiness index.
The intrinsic value of health itself is a kind of wealth in life. In addition, health has expanded the instrumental value of human development in many aspects. However, compared with the "educational level" which is also a form of human capital, it is difficult to find an index similar to "educational background" to measure it relatively accurately. "Self-rated health" method is widely used in China. Liu Guoen introduced four health measurement indicators: anthropometric indicators, survival rate and mortality rate, incidence rate, overall health status and functional status.