The purpose of this study is to explore the effect of the influence of animal assisted therapy on elderly people's depression, stress and suicide ideation. The research was carried out in the order of preparatory conference, subject selection, composition of program plan, pre-test, AAT program, post-test, and processing of results during the period of March to November 2016. Seven elderly people considered in having depression and suicide probability as a result of selection test for life respect will was chosen from Goyangcity Daehwa Senior Welfare Center, province Gyunggi as the subjects for this research. The content of AAT program was implemented on the experiment group for a total of 12 sessions, 60 minutes once a week including pre-test and post-test. Elderly depression scale, Elderly stress scale, and Elderly suicide scale were used as research tools, and the results of pre- and post-test were analyzed. The findings of this research produce meaningful and positive result that the depression and stress level of subjects marked a lower score on the post-test compared to the pre-test, and that the score of suicide ideation marked a lower score on lower score on the post-test compared to the pre-test. This paper concludes that AAT test has a positive effect on the restraint of elderly people's depression, stress and suicide ideation.