The purpose of this study is to analyze the relationship between the importance of self‐identity, self‐realization intention and happiness index of middle and high school students and to give a chance to change the perception of school sports club management necessity by presenting the effectiveness of school sports club management to help solve the school violence and bullying problems which are considered as serious issues in recent school problems. As of 2016, the participants in secondary school sports clubs in P region and U region were selected as the population, and the sample was extracted by multi‐stage stratified cluster sampling method considering the regional distribution of the subjects. Data were analyzed by multiple regression analysis and statistical significance was tested at p<.05 level. Based on the above research method and data analysis, the conclusions obtained by the hypothesis are as follows. First, the selfactualization, inclusiveness, and self‐affirmation of self‐realization factors are higher as the factors of intimacy, subjectivity, and future certainty are among the factors of self‐identity of school sports club participants. Second, the higher the factors of intimacy, subjectivity, self‐acceptance, and future confidence among the factors of self‐identity of school sports club participants, the higher the social relationship happiness index, and the higher the factors of self‐acceptance, future confidence, and intimacy, the higher the family happiness index. Third, the higher the self‐actualization and self‐affirmative factors among the selfrealization factors of the school sports club participants, the higher the social relationship happiness index and the family happiness index.