This study was designed to verify the effects of Animal Assisted Therapy program on aggressive children’s school life improvements and social skills. The 2 children chosen for the study under agreements were brothers raised by violent. father and uncaring mother. The children were both having trouble adjusting to school rules and regulations with distracted and aggressive attitudes accompanied by inadequate social skills towards classmates and teachers they associated with. The AAT program was proposed as a form of educational donation and conducted as 14 sessions of 40 minutes for each child as an individual therapy session at the elementary school consultation room, Daejeon, once a week after school hours, with 2 therapy dogs, a cat or birds controlled by 1 therapist. KSD : Kinetic School Drawing, KFD : Kinetic Family Drawing, SCT : Sentence Completion Test were used as the scales to measure the effects of Animal Assisted Therapy on this study. KSD analysis showed the differences between the preliminary and the post tests, which changed from the violent expression to the positive and cooperative behaviors with their associates as well as their participations in the class. KFD also showed dramatic changes from isolation of each family member to gathering and sharing a space among family members despite absence of their mother. SCT: Sentence Completion Test showed their emotions more in detail related to the recent changes in family matters. The realistic achievement of this study was that the family was arranged to go under control of the Ward Office by Family Solution Project, which would insure continuous monitoring and further care. The education and consultation for the fosterers were also to be offered on a regular basis.