The impact of violence in the junior high school was examined. It idhypothesized that the school environment and community services in general affect both the students’ academic performance and the 

delinquent behavior. 

Four hundred and ninety-six students drawn from two junior high schools in Taipei(160 male and 160 female from school I, 88 male and 88 female from school II) participated in this research, The sample of staff subjects (n=136) consists of homeroom teachers and administers in both schools. Thirty-seven staffs are invited to the meeting to share their opinion on aggression prevention in the school. Twelve volunteered students from obth schools are interviewed regarding school violence, Data about school environment (school schedule and campus building) were collected through natural observation by six college students from National Taiwan Normal University. 

Data collected from students and staffs analyzed, It is found that (1)mild and moderate aggressive behavior are more prominent than severe aggressive behaviors;(2) students tend not to trust school’s ablity to protect them;(3) teachers generally lack of self confidence in dealing with the students’ conflicts;(4) both students and staffs felt helpless and anxious about the situation; and (5) there are cognitive discrepancies between students and teachers in valuing the quality and the quantity of school violence. 

This study suggests that it is more effective if interventions take place at the ecological level. Future research on prevention and intervention are recommended.