The study aims at discussing issues concerning the establishment of the cooperative repository libraries based on regional central libraries which not only support various types of regional libraries and conduct cooperative businesses with them, but also are responsible for collecting and preserving library materials. The study analyzes concepts and types of cooperative repository libraries by literature review and explores cooperative repository libraries in the United States. Futhermore, it conducts a survey and finds that the regional central libraries do not perform their preservation functions, due to the lack of their manpower and budget. As a result, the study provides an establishment plan for cooperative repository libraries which participant libraries hold ownership of transferred materials and regional central libraries own the right of management. Also, it suggests to expand cooperative repository libraries' service coverage from participants to regional communities.