This paper intends to analyze the interfaces and authorization mechanisms of digital resources sharing by examining the digital resources management systems established by National Taichung Library for the purpose of providing the service of digital resources sharing in public libraries, including electronic databases, e-books, digital audio and video resources, and e-learning materials. The analyzed systems include General Access to Public Library Digital Resources, E-book Service Interface, Online Audio-Visual Media Center (VOD system), and Distance Learning Center (E-learning system). This paper finally points out some issues related to current applications of digital resources and future development of management systems in public libraries. These issues should be considered in order to formulate more reasonable authorization mechanisms and expand the scope of digital resources sharing in public libraries.