The recent diversification of society surrounding libraries is influencing the services of libraries. This study suggested the directions of public library services from the aspect of the universal design based on the analysis of related systems and cases to provide all users with universal services in accord with the nature of public libraries amid rapidly changing social environment. This study suggests four directions: the "universal design" which is the keyword for pursuing universality of public library services; the pursuit of economic value of public library services based on the universal design; the universal design for the improvement of perception of public library services; change in policies and systems related to public library services through the application of the universal design.