On the basis of the construction of the discipline navigation library in Jiangyin Polytechnic College,the paper describes the reason and practice of constructing the navigation library of chemistry and chemical industry,discusses the method of accessing and managing of the resources in the navigation library and puts forward some suggestions to the further development of navigation library.

The paper analyzes the present situation of subject navigation database of library,discusses some questions in the construction of subject navigation database in university library,and puts forward relevant countermeasures,and predicts the future development of subject navigation database.

This paper introduces the definition and types of the subject navigation system,probes into the necessity and significances of the subject navigation system,and analyzes the differences between subject navigation system and search engine.

This paper discusses the status quo of the key subject navigation system in college,and puts forward the countermeasures of its sustainable development.

This paper probes into several problems in the construction of subjects navigation system of university such as classification system of subjects navigation system, the acquirement of information resource, and the screening of information, etc.

Through browsing, investigating and analyzing some homepages of subjects navigation system in the university library, this paper advances some suggestions on the construction of subjects navigation system in university library.

Through the analysis on the features of the network resources, this paper puts forward the standards for the metadata of network resources based on the navigational bank of major subjects of Zhongnan University.