The aim of this research was to investigate the relationships among activity involvement, satisfaction and revisit in Island of Penghu. Whether the perceived value was the mediated moderator between activity involvement and revisit? Electronic questionnaires made in Google Form, the convenience of sampling, recovery of 350 copies, analyzed with JASP statistical software. The results showed: Firstly, Involvement has a positive influence on satisfaction. Secondly, Satisfaction has a positive influence on revisit. Thirdly, Involvement has a positive influence on revisit. Fourth, Perceived value has mediator effect on the relationship between activity involvement and revisit. Based on the aboved research results, this research would make recommendations to relevant units to further promote the tourism industry in the southern main island of Penghu.