Recently, attention has been drawn to a new form of a public library, that is, a public library in a complex facility constructed in the same building or site with another facility. To get active users’ or local governments’ supports in the public library in a complex facility, it is necessary to build library strategic plans based on the analysis of users’ evaluation and demands. Thus, this study analyzed the user satisfaction and perception of the 28 public libraries in complex facilities in Seoul. As a result, it was found that most users overall satisfied with public libraries in complex facilities in terms of human resources, information resources, and the links among services and positively perceived their environments and services. In order to provide more satisfaction to the users in public libraries in complex facilities first, it is necessary to improve the accessibility of libraries, to secure the sufficient library space, to prevent the outside noise, to link the facilities which bring mutual synergistic effect, and to develop a program and service accompanying other facilities.