The object of this study is to help children from multicultural households adjust to school life and improve self-esteem. Fifteen students from multicultural households who attend the elementary school from 4th grade to 6th grade in Sa-sang gu were organized for this study. The measurements in this study are self-esteem and adaptability of school life. Research design for this study is pretest-postest control group design. The main results of this study are as follows; First, the experiment group from multicultural households who experienced Character Development Program showed a meaningful difference statistically in terms of self-esteem improvement compared with the control group. Second, the experiment group who participated in Character Development Program had higher score, than the control group in the subordinate factors of school life adaptation such as teachers, friends, class attitude and school regulations. As a result, Character Development Program enables children from multicultural households to improve their school life adjustment.