Behavioral intervention is the core of health education, and the evaluation of health education projects and work effects mainly depends on whether people's behaviors have really changed. People's behavior refers to the dynamic reaction of people's psychological activities such as cognition, thinking, emotion and will under the influence of internal and external environmental factors, which is the result of the joint action of human biological factors (heredity), environmental factors and learning factors. According to the generation of behavior, human behavior can be divided into instinctive behavior and learned behavior, high modifiable behavior and low modifiable behavior according to the modifiability of behavior, and healthy promotion behavior and harmful behavior according to the influence of behavior on health. In order to change people's behavior, we must find out the influencing factors of people's behavior generation, maintenance and elimination, and take intervention measures against these factors. According to the conditioned reflex theory, human behavior is produced, maintained or eliminated because of the stimulation of environmental conditions, and the repeated appearance of environmental conditions helps to establish, maintain or eliminate a certain behavior. Operating conditioned reflex thinks that people's behavior will be influenced by the result of behavior. If an individual is encouraged or supported by the society because of the implementation of a certain behavior (including self-psychological satisfaction and pleasure for the result of the behavior), this behavior will be maintained, otherwise it will be gradually eliminated. According to Green's model, human behavior will be influenced by three factors: inducing factors (knowledge, attitude, beliefs, values, existing skills, etc. ), contributing factors (environmental support, service provision) and strengthening factors (encouragement, affirmation, criticism, etc. From around). There are other theories to study the influencing factors of behavior, such as health belief model, stage change theory and social cognition theory. Based on the above influencing factors of behavior change, the following behavior intervention measures should be considered in health education: Policy intervention: measures that have a mandatory impact on people's behavior through the introduction and change of policies, regulations and rules that affect people's behavior change. Such as prohibiting smoking in public places, legislating to force employers to buy health insurance for employees, compulsory protective measures in toxic and harmful workplaces, and national immunization programs. It also includes the policy measures taken by the government, such as the financial subsidies provided by the China government to encourage rural residents to participate in the new rural cooperative medical system, the measures taken by the US government to increase tobacco tax to reduce people's smoking, and the measures taken by the Australian government to reduce the price of fruits and encourage people to eat more fruits. Environmental intervention: measures to change or maintain people's behavior by changing the environment, such as opening sports venues for people, improving water, toilets and greening. Information intervention: through education, communication and consultation, provide people with knowledge and information that is beneficial to behavior change or maintenance, so as to promote people to form attitudes, consciousness and values that promote behavior change or maintenance, master health skills, and finally promote people's behavior change. Interpersonal intervention: the process of intervening in people's behavior by using social psychological phenomena such as peer pressure, social demonstration and conformity. Organizational intervention: take measures to change or maintain people's behavior within the organization, such as organizing collective activities, introducing internal rules and regulations, improving interpersonal relationships and office environment, including reward and punishment system, so as to change or maintain people's behavior. Service intervention: measures to change or maintain people's behavior by providing services, such as providing free blood pressure measurement services near community health service centers and providing condoms for high-risk groups of sexually transmitted diseases and AIDS. Drug intervention: a measure to change people's behavior by taking drugs, which is generally used in psychological and behavioral therapy.