The purpose of this study was to find ways to prevent and support at-risk students at the school level. To this end, the situation of at-risk students was considered, and the status and limitations of the school safety integrated system (Wee Project) were investigated. In addition, the characteristics of School-Wide Positive Behavior Support(SWPBS) and the results of SWPBS for students at risk and students with emotional and behavioral disabilities were reviewed through domestic and foreign papers. As a result of the study, among Korean adolescents, there is a high rate of stress perception, depressive experience, and deliberate self-harm(suicide) among the causes of death. It was found that there were many students in the interest group of the school emotional and behavioral characteristics test, and the ratio of the victims of school violence and victims was high. The School Safety Integration System(Wee Project) was found to have limitations such as insufficient Wee class construction, insufficient professional counselor placement, and so on. SWPBS has been tested and verified in improving academic, social, and behavioral skills of students with emotional and emotional disabilities. In this study, the prevention and support plan for at-risk students through the application of SWPBS were suggested.