The disadvantage of online library is that it lacks the motivation to urge each other to learn. Readers are very tired when they study, and there is no one else to urge them, so they slack off. A library is an institution that collects, sorts out and collects books and materials for people to read and refer to. As early as 3000 BC, libraries appeared. Library has the functions of preserving human cultural heritage, developing information resources and participating in social education.