The purpose of this study was to examine the demand of parents and teachers for a children's library and analyze the need in consideration of their age and children's library-using frequency. The subjects in this study were 1,500 parents and teachers in the region of Gwangju, on whom a survey was implemented to find out the necessity of a children's library, what should be considered in terms of design and program development and what forms of materials should be provided. As a result of checking their needs for the functions of a library, the parents and teachers investigated attached importance to culture, welfare and hands-on culture/art programs as what a library should focus on. Second, as for design, they gave top priority to comfortableness(sanitary facilities, ventilation, humidity and temperature) and safety(sofas, cushions and carpets for children). Third, as to program preference, both of the parents and teachers considered activity, performance and educational programs necessary among multiple kinds of ongoing programs. Specifically, performance programs ranked first among the parents and third among the teachers. Activity programs ranked first among the teachers and third among the parents. Fourth, concerning the importance of materials possessed by a library, they placed the most emphasis on the kind of materials that could foster creativity and instill the right personality.