The purpose of this study is to improve the self-esteem and sociality of children by examining the effects of traditional music-centered music therapy programs on children's self-esteem and sociality. Among 24 children in A city, Gyeonggi-do, 12 control and 12 experimental groups were randomly assigned for the study. In order to verify the homogeneity between the experimental and the control group, this study conducted ANCOVA by controlling the pre-test results as a covariate to verify the effectiveness after the t-test. The results of the study are as follows. First, the traditional music-centered music therapy program had a positive effect on improving the total self-esteem and sub-category of children, competence, value, and control. In other words, the tractional music-centered music therapy program effectively contributed to the improvement of children's self-esteem. Second, the program had a positive effect on children's overall social scores as well as cooperation, other people's understanding, and peer-to-peer interactions among sub-domains. In other words, the program was effective in improving children's social skills. From the above research results, it was proved that the traditional music-centered music therapy program has an effect on improving self-esteem and sociality of children, and is effective in an intervention program for improving self-esteem and sociality by helping emotional stability and psychological recovery.