1. Preservation of cultural heritage: One of the functions of the library is to collect, process, arrange and scientifically manage these precious literature resources for readers to borrow and use. The library exists as an institution to preserve the cultural wealth of all ethnic groups, and its task of preserving human cultural classics is the oldest function of the library. It is based on literature and carries out commercial activities.

2. Develop information resources: the library has a large number of literature information resources. It is one of the important functions of the library to actively develop and widely use these literature resources, and it is also the basis for the library to undertake various functions. Due to the mass production and rapid growth of social documents, the types of social documents are complex and diverse; The timeliness of documents is strong, the speed of document dissemination is accelerated, and the contents of documents overlap and repeat; The language used in literature is expanding and the quality is declining, which makes people generally feel that it is not easy to use. Through the processing, scientific analysis and comprehensive guidance of literature information resources, the library forms an orderly, regular and continuous information flow, carries out more extensive communication and transmission, and makes readers make better use of it.

3. Social education: China is a socialist country under the dictatorship of the proletariat. The purpose of ideological and political education in libraries is to guide and help readers to establish a correct world outlook, outlook on life and values, lay a scientific theoretical foundation and establish the political direction of building a Socialism with Chinese characteristics.