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.

Library is the external storage and selective transmission mechanism of social memory (usually expressed in written records). In other words, the library is the earliest memory device and diffusion device of social knowledge, information and culture-according to the excavation results of archaeologists, we know that the earliest library in the world is Nineveh Library in Mesopotamia (Ashubeniba, king of Assyria, established it, so it is also called Ashubeniba Library).