Utilizing volunteers is one of the essential strategies to enhance and diversify the library service, especially in public libraries which have limited human resources. The purpose of this study is to explore a guideline which can be applied to recruit and manage volunteers in public libraries. To prepare a guideline, library volunteerism in foreign countries was discussed through the literature and the internet, and an empirical survey was conducted to analyze the volunteer management condition in 422 public libraries. Based on these surveys, a guideline composed of eight steps was recommended. This guideline can help libraries recruit, train, retain, and supervise volunteers in effective manner.