This paper summarizes the generation and main expressions of information redundancy, expounds the conflict between the information redundancy and the insufficiency of literature security, and probes into the construction of literature security service system of the library.

Through analyzing on the literature guarantee services of Shanghai Library and British Library,this paper points out the superiorities of Shanghai Library and British Library and the differences between Shanghai Library and British Library,and advances some suggestions on improving the literature guarantee service of domestic libraries.

Discussion on the Rate of Document guarantee of Electronic-journals Full-text Database;

This paper introduces the difficulties of the literature guaranteeing in university library, analyzes on the present situation of the utilization of the free network information resources, and taking the library of Wuhan University of Science & Technology as an example, probes into some porblems about utilize the free network information resources.

Strengthening the service position of university library in the scientific research must lift the corresponding levels in the literature guaranteeing, technique supporting, retrieval serving, librarians quality improving, and information consciousness establishing, etc.