The essay discuss the intervention on policeman, survey in a sample of 401 policemen on Chai-I county police station. Police are the main body on maintain the public safety as well as social order. For the application of compulsory and exclusive force, police are difficulty to win the respect as well as support from the community in spite of the necessity. It finally became an exchange of welfare between the policeman and community. The policeman would possibly be isolated from his colleague only if he refused to accept the intervention form the community. By this survey, the study want to reach conclusions listed as follows: 1.The statistical distribution of background of the sample 2.The statistical distribution of intervention on the sample 3.The statistical deviation of intervention caused by personal background 4.The statistical deviation of intervention caused by job background