The problem of library space has long been discussed in various aspects such as library relations, architecture, and space design. The purpose of this study is to examine the change of the concept of the complex space of the library according to the development of advanced technology and the social paradigm, and to present the direction of constructing the complex space of the future library by analyzing each case. All concepts such as mediatheque, information commons, larchiveum, and the maker space that is recently introduced into the library are important elements of the complex space presented as a problem of library construction and space. The future library reflects these concepts and serves as a mediator between information and users, users and users, users and media to support reading, information, learning, rest, community-oriented culture and creation, start-up and collaboration. It should be constructed as a multi-space platform to create new value through.