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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 memory device and diffusion device of social knowledge, information and culture.

The earliest library-According to the excavation results of archaeologists, we know that the earliest library in the world is Nineveh Library in Mesopotamia. This is the most complete, largest and complete ancient civilization site library excavated today. It was more than 400 years earlier than the famous Alexandria Library in Egypt, and because of the particularity of mud-printed books, it was not destroyed by the war like Alexandria Library, and most of them were preserved.

As early as 3000 BC, there were various records carved on clay tablets in the temples of Babylon. The earliest collection places are the collection places of Greek temples and the collection places affiliated to the Greek Philosophy Institute.