With the rapid development of computer technology, communication technology and network technology, the construction and utilization of information superhighway provides environment and conditions for the development of large-scale information systems and library systems. At present, network information management technology, digital processing technology and the construction of digital information resources have become the focus of international competition, and all countries have invested considerable efforts in research and development. The new concept and mode of "digital library" came into being, and it was regarded as one of the main development directions of information industry in the 2/kloc-0 century.