Digital Library DL (Digital Library DL) is a brand-new concept that appeared after 1990s. With the rapid development of computer technology, especially the comprehensive popularization of network technology, digital storage and transmission technology, people have new requirements for the processing, storage, query and utilization of literature information. Therefore, the digital library came into being. Digital library is a technical field to promote the research of multimedia massive digital information organization and Internet application. Simply put, almost all the carrier information in the library can be obtained in digital form, including all online purchases, cataloguing and public inquiries; Search various information resources, and organize readers to visit external digital libraries and document information database systems through the network, such as e-magazines, e-books, audio-visual materials, cartoons, film and television films, multimedia materials, etc. Using computer system to manage the service for readers of books and periodicals: the library uses the Internet to connect to every corner of the world to facilitate people to enjoy resources.