The purpose of this study is to provide the development direction and model for the 21 century public library. The 21 century public library should have the accessiblity for everyone and provide the satisfaction for all kind of information needs. For these, public libraries would be organized by the type of users and topics and share the resources with others. Staff should be hired by the certification based upon education, research, and experience. For the models of public libraries, there were divided to three types : metro, midium, and small rural type of libraries.