The aim of the study is to investigate the effect of family harmony and peers social interaction on emotional maturity via quantitative, descriptive and correlation research methods. As a result of research from SEM Amos 4.01 analysis, there were significant direct effects of family harmony toward emotion maturity toward students’ attitude. In conclusion, there is a direct and indirect relationship between the harmony of the family, peer social interaction, emotional maturity, attitude and self-concept in relation to the practice of teaching Tri Kaya Parisudha.