Health means that a person is in a good physical, mental and social state. Health includes two aspects: first, the main organs are disease-free, the body shape develops well and evenly, the physiological functions of various human systems are good, and there is strong physical activity and labor ability, which is the most basic requirement of health; Second, it has strong disease resistance and can adapt to the effects of environmental changes, various physiological stimuli and pathogenic factors on the body. The traditional concept of health is "disease-free health", while the modern concept of health is overall health. The World Health Organization puts forward that "health is not only the absence of physical diseases, but also mental health, good social adaptation and morality". Therefore, the health of modern people includes: physical health, mental health, mental health, social health, intellectual health, moral health, environmental health and so on. Health is a basic human right. Health is the first wealth in life.
Health literacy refers to the ability of individuals to obtain and understand health information and use it to maintain and promote their own health. The evaluation index of residents' health literacy is included in the national health development plan as an evaluation index that comprehensively reflects the national health development. Citizen's health literacy includes three aspects: basic knowledge and ideas, healthy lifestyle and behavior, and basic skills.