205 -The purpose of this study is to propose the appropriate strategies for establishing the mission and roles of National Central Library. For this purpose, examined are the following aspects: (1) how and by whom the mission and roles of National Central Library have been defined, and what are included; (2) what are the missions and roles taken by its counterparts in other developed countries, and recommended by international organizations; and (3) how National Central Library, as the center of national information resources, can be further committed and developed to be the key institution in the knowledge-information society, by re-evaluating and establishing its roles and mission.