The purpose of this study is to investigate the psychosocial function of self-efficacy, interpersonal relationship, and happiness by transforming the irrational thoughts of schizophrenia member s into rational thoughts. The study subjects were 26 patients who were diagnosed as chorus disease according to the DSM-5 standard and participated in the rehabilitation program at the mental health welfare center. They were randomizationed to 13 experimental groups and 13 comparison groups, respectively. The experimental group participated in the cognitive-behavioral program in addition to the rehabilitation program, and the comparison group participated only in the rehabilitation program. The experimental period of the cognitive-behavioral program was from May 8, 2017 to June 7 of the same year. The collected data were analyzed using SPSS (Statistical Package for Social Science) v.19.0 Social Statistical Analysis Program. The results of the study are as follows. First, the cognitive-behavioral program promoted self-efficacy of schizophrenia s. Second, the cognitive-behavioral program promoted the interpersonal relationship of schizophrenia s. Third, the cognitive-behavioral program was not effective in enhancing the happiness of schizophrenia s. Therefore, we think that the cognitive-behavioral program can be fully utilized to improve the psychosocial function of schizophrenia s. Therefore, it is expected that it will be continuously studied and utilized in community organizations.