This paper designs and implements an information retrieval system based on semantic grid, which has several important characteristics:
a) Based on ontology technology, the information retrieval is realized in semantic level. Through semantic interaction and semantic reasoning technology, it can better define the user needs, and thus significantly improve the retrieval recall factor and pertinency factor.
b) Make several network database of computer document field as the possible source of information retrieval.
c) Develop intelligent information retrieval agent, fix the retrieval need automatically to appropriate data source, and further enhance the personalized and intelligent of the
retrieval system.