Abstract： Objective To investigate unhealthy behaviors and their influence on community residents,and to evaluate the effectiveness of modified behaviors. Methods A total of 1230 community residents were randomly enrolled from 8 of 16 communities in Yantian District of Shenzhen City. The behavior information of the participants was collected through face-to-face interviews. A systematic intervention was carried out to the target residents, and the outcomes were evaluated. Results The awareness of healthy behaviors was improved and unhealthy behaviors (i. e. lack of physical activity,over-intake of salt, cigarette smoking,alcohol consumption,irregular health check-up, long-time watching TV) were significantly reduced ( P < 0. 05 ). Conclusions Systematic intervention could be an effective way to reduce unhealthy behaviors of community residents.