This study aims to develop a couple sandplay program using the imago method for the individual and relationship growth of premarital couples, and verify the effects amongst participating groups. To fulfill these objectives, the program selected eight premarital couples residing in the metropolitan area, and used the “imago couple therapy” method as a therapeutic tool for addressing childhood wounds after understanding their emotional experiences and the psychological dynamics of their childhoods, and applied “sandplay therapy” for imaging and materializing imagery. The program is composed of a total of six sessions with contents of the past, present and future. The subjects of the study include eight couples, who were divided into experimental and control groups, respectively, for verifying the effects of the program. The program was conducted by targeting four participating groups for two hours each session for six weeks. As for the analysis, this study carried out a statistical comparison between the experimental and control groups through ex ante-ex post analysis, and applied the details of the analysis comprehensively through counseling. The results of the analysis on the effects show that the premarital couples belonging to the experimental groups experienced individual growth by improving their self-identity and ego resiliency as compared to those who had not participated in the couple sandplay therapy program using the imago method. Such results indicate that the couple sandplay therapy program using the imago method is effective for relationship growth by improving intimacy between couples, strengthening marital relations, improving communication and teaching methods for coping with conflict.