The purpose of this research is to analyze the logical and legal basis for the development of new branch libraries of the National Library of Korea(NLK) and then to propose the strategic direction of planning the branch(es) as an appropriate model for the future delivery of NLK services. In this research, it is emphasized that the branch(es) of the NLK should not be perceived as "another large public library, " but rather be planned to help consolidate and expand the basic roles of the NLK and reinforce its identity as a national library. In addition, it is recommended that the branch(es) should be located outside the Seoul Metropolitan area to facilitate the services to the larger public, and some programs and activities for the underprivileged and the multi-cultural families in our society as well.