The purpose of this study is to evaluate current library cooperation system and to identify what fields should be cooperated with other libraries. A survey and group interviews are used for research method. The results show that only under 30% of respondents estimated the success of library cooperation system. The system needs to be changed. Online catalog and DB are evaluated as important fields, while the shared/cooperation acquisition is evaluated as less important field in current cooperation system. Also, education cooperation, the cooperation of education and culture programs, and advertisement cooperation are more necessary. The shared/cooperation acquisition is less necessary in library cooperation filed. The membership libraries of cooperation systems and library location are affected to responses as a factor. This study proposes two library cooperation systems: upload library cooperation system and download library cooperation system.