Digital library is a brand-new science and technology as well as a brand-new social undertaking. In short, it is an advanced service mechanism of digital information resources with various media contents, which can provide users with information conveniently and quickly. Although it is called a library, it is not a library entity: it corresponds to.

The real social activities of various public information management and dissemination are manifested in various new information resource organizations and information dissemination services. It refers to the resource organization mode of the library. With the help of high-tech such as computer network communication, aiming at the universal acquisition of human knowledge, it creatively uses knowledge classification and accurate retrieval methods to sort information effectively, so that people's access to information consumption is not limited by space or time to a great extent. Its service is based on the concept of knowledge, transmitting digital information such as words, images and sounds through the Internet, thus enjoying information resources. Every user with any computer terminal can enjoy the digital information resources of any "information space" in the world conveniently and quickly at any time and any place as long as he logs on the website of the relevant digital library through networking.

Generally speaking, the digital library is a virtual library without walls, an extensible knowledge network system based on network environment, a super-large-scale, distributed and easy-to-use knowledge center, which can realize seamless linking and intelligent retrieval across databases and is not limited by time and space. Digital library is not only a complete knowledge positioning system, but also an information management model facing the future development of the Internet, which can be widely used in public information dissemination of all social organizations such as social culture, lifelong education, mass media, business consultation and e-government.