Adolescence is a period of rapid change and development both physically, cognitively, emotionally and socially. Self-regulation ability has been reported to be an important factor in adolescents healthy growth. Self-regulation affects adolescents academic achievement, mental health and misconduct. This study proposes and verifies the effectiveness of an MBTA program that has been suggested to improve adolescents self-regulation ability. To verify the effectiveness of the MBTA program, the test group and the comparison group were tested for self-regulation using nonequivalent comparison group design. The results of this study suggests that the MBTA program was effective in improving the self-regulation ability of adolescents. Increasing the self-regulation ability of the test group was found to have increased the use of self-regulation mode, a positive self-regulation method. On the other hand, there was no statistically significant difference between the use of the self-inhibition mode before and after the program. This study raised the importance of improving self-regulation ability by recognizing the importance of cognition, emotion, and behavior control of adolescents. And MBTA program is meaningful in that it suggests the effectiveness of practicing as a group program to improve the self-regulation ability of adolescents at school or social welfare sites.