The purpose of this study is to examine the effect of bibliotherapy on college students' competency. For this purpose, data were collected from the students who participated in bibliotherapy class. As a result, it was found that bibliotherapy strengthened college students' competency. Specifically, it was found that bibliotherapy has a positive effect on enhancing self-identity and interpersonal relationships in college students. In addition, it has a positive effect on problem solving, and motivation for achievement. These results may be a rationale for the need of bibliotherapy course to strengthen students' competency at college.