The purpose of this study was to determine the effectiveness of group therapy on the quality of life of participants attending the Conference of viewing (Didan) of the Living Word Institute. The research method was semi-experimental and pretest-posttest design with control group. The statistical community of all participants was at the referral conference in 1394. The volunteers were selected by random sampling and were randomly assigned to experimental and control groups (n1 = n2 = 15). The quality of life of all participants was measured by the WHO Quality of Life Questionnaire (1996). Interventions based on reality therapy were performed in 9 group sessions for two weeks for the experimental group and no program was performed for the control group. At the end of the interventions, the quality of life of all participants was re-measured (post-test) and analyzed using multivariate covariance analysis. The results showed that therapeutic-based interventions had a significant effect on the quality of life of participants (P <0.01). Based on the results of the study, it can be concluded that the reality of therapy is an appropriate educational-therapeutic method for improving the quality of life of individuals.