How to measure whether a person is healthy, the World Health Organization has set out 10 standards of health: 1, have plenty of energy, can comfortably take care of daily life and heavy work, and do not feel excessive tension and fatigue; 2, optimistic, positive attitude, willing to take responsibility for anything, no matter how big or small, do not picky; 3, good rest, good sleep; 4, adaptable to all kinds of changes in the external environment; 5, can resist general colds and infectious diseases; 6, appropriate body weight, well-balanced body; 7, bright eyes, quick reaction, eyelids are not easy to inflammation; 8, clean teeth, body weight, head, shoulders and arms position coordination when standing; 7, bright eyes, quick reaction, eyelids are not easy to inflammation; 8, teeth are clean, well-balanced body. , able to resist general colds and infectious diseases; 6, appropriate weight, body proportions, standing, head, shoulders, arm position coordination; 7, bright eyes, quick reaction, eyelids are not easy to inflammation; 8, clean teeth, no caries, no pain, gums of normal color, no bleeding phenomenon; 9, hair glossy, no dandruff; 10, muscle plumpness, elasticity of the skin. These 10 criteria, specifically elaborating on the definition of health, reflect the three elements of physical, psychological and social aspects that health encompasses. Firstly, it is stated that the purpose of health is to use abundant energy to undertake social tasks without excessive tension and fatigue from heavy work; secondly, it emphasizes mental health, showing optimism and a sense of responsibility to society and a positive attitude in everything; thirdly, it should have strong adaptability to changes in the external environment (including the natural environment and the social environment) to maintain a constant balance with the changes. Thirdly, they should be highly resilient and adaptable to changes in the external environment (both natural and social) in order to maintain a constant state of equilibrium and perfection in relation to these changes; fourthly, they should be able to set standards from several major aspects that can clearly show their physical well-being, such as weight (appropriate weight can show a good and reasonable state of nutrition), stature, eyes, teeth, muscles, and so on.