The library is an institution that collects, sorts out and collects books and materials for people to read and refer to, and the library is a service facility of the library, which is generally a place for readers to use documents and read books. There are also many related classifications of libraries, which are divided into six categories: national library, university library and school library. The library has a small scope and is divided into general reading room, special reading room and reference research room. There is still a big difference between the two.