Healthy behavior refers to all kinds of activities carried out by people in order to enhance their physical fitness and maintain their physical and mental health. Such as adequate sleep, balanced nutrition and exercise. Healthy behavior can not only enhance physical fitness, maintain good physical and mental health, prevent diseases caused by various behavioral and psychological factors, but also help people form healthy habits. Because the occurrence of frequently-occurring diseases and common diseases are mostly related to behavioral factors and psychological factors, and the occurrence and development of various diseases can finally find the correlation between behavioral and psychological factors, we can prevent the occurrence of diseases by changing people's bad behaviors, bad living habits and developing healthy living habits. It can be seen that healthy behavior is the key to ensure physical and mental health and prevent diseases.