In this paper, the author adopts "Taiwan Integrated Postsecondary Education Database: the 2008 college junior student questionnaires" to examine junior students' club-participating time, perplexity, ill-studying behavior, and various effects of club participation. The results indicated that the amount of time that they spent on club participation is getting smaller. It is the demographic factors that differentially affect students' club-participating time. Furthermore, students' club experiences have a different effect on students' perplexity, ill-studying behavior, academic performance, degree aspiration, interpersonal skills and ability to well handle affairs. The more engaged students reported greater gain from their joining in student clubs. The implications of the findings are discussed at the end of this paper in order both to improve the current situation of students' club life and to help grow students' development.