1. Preservation of human cultural heritage: Taking the library as an institution, the experience, culture and knowledge gained by human social practice can be systematically preserved and passed on, and become a valuable cultural heritage and spiritual wealth of mankind today.

2. Carry out social education: The emergence of modern capitalist industries requires workers to have more labor knowledge and skills, and the library undertakes the task of educating workers on scientific knowledge and culture. In modern society, the library has become the base of continuing education and lifelong education, and has undertaken more educational functions.

3. Transmitting scientific information: The rich, systematic and comprehensive library information materials provide material conditions for engaging in scientific information transmission.

4. Developing intellectual resources: The books and materials collected by the library are a kind of intellectual resources accumulated by human beings for a long time, and the processing of these resources by the library is the development of intellectual resources.

5. Providing cultural entertainment: It meets the social demand for cultural entertainment, enriches and enlivens people's cultural life, and plays an indelible role in the construction of spiritual civilization.