This study aimed to prove if a food art therapy, which uses food to help adolescents with intellectual disability to express their emotions or abilities, would have a positive influence on changing social/emotional behaviors of the adolescents. The study, first, selected four adolescents with intellectual disability in a welfare center located in G city as research participants. As the research participants, the adolescents attended a total of 13 sessions, and every session was conducted once a week for 90 minutes. In order to observe changes not only in social but also emotional behaviors of the adolescents, the study used IBM SPSS Statistics 21 program to conduct a paired-sample t-test as in a quantitative analysis, and in terms of a qualitative analysis, every single activity during the sessions was carefully looked into as being recorded and analyzed. The main findings of the study are summarized as follows. The food art therapy would have significant effects on the adolescents' social behaviors. It was also learned that the food art therapy would lead the adolescents to significant changes in their emotional behaviors. It is considered not good enough to generalize what the study has found since it had investigated only a few number of research participants and yet, the study argues that it is necessary to actively practice this psychotherapy program called a food art therapy both at special schools and welfare centers for the food art therapy would make good use of food to help social/emotional stability of the adolescents.