The purpose of this study was to investigate the effects of a art Reality group therapy upon internal and external control, autonomy, and peer relationship of multi-cultural children. The participants of the study were 17 multi-cultural children. Nine of them were assigned into the experimental group(Reality art group therapy) and 8 were assigned into the comparative group(art group therapy). The research design used was the pretest-posttest comparative group research design. A total of 8 sessions of the programs were run, 2 sessions a week, each session for 90 minutes. The instruments used were the scales for internal and external control, autonomy, and peer relationship skill. The data were analyzed using mean, standard deviation and covariance of the SPSS 22.0. The results of the study were as follows. First, the experimental group showed a significantly higher increase in internal control than the comparative group. With respect to external control the experimental group showed more reduction than the comparative group. Second, the experimental group showed a significantly higher increase in autonomy than the comparative group. Third, the experimental group showed a significantly higher increase in peer relationship than the comparative group. The Reality art group therapy was found to be able to improve emotional function in multicultural children who have various problems, to search for their own behavior and to control themselves. In addition, it was also found that would be possible to reduce the external controllability to control others or environment in order to satisfy the wind. Thus, this study was effective in controlling multicultural children s life effectively by making their actions more responsive to their choices and choices. The results of the study showed that the group art therapy program using reality therapy was a more effective one than the group art therapy only program in improving the inner control, autonomy, and peer relationships of multi-cultural children.