This study purposed to explore preventive role of school counseling of at-risk adolescents' dropout from school and society. To investigate it we performed a qualitative approach by analyzing the 13 cases of school maladjustment which were reported by school counselors. We derived significant meaning, formulated meaning, theme, theme clusters, and clusters from the data. The findings of this study were as follow: first, to prevent adolescents' dropout school counselors should have intervened complex harmful circumstances related with them as well as treated with mental problems. Second, to intervene the maladjustive social environments of adolescents the school counselors had served family support, medical support, law consultation and so on by using community youth safety network.