For the users convenience of accessing the AGRIS resources quickly and using them fully,the paper decomposes the structure of AGRIS Search net,analyzes the users requirement met for conducting a bilingual (ZH/EN) retrieval,the system function extensions based on AGRIS English retrieval system and the key issues which the core function module should resolve.Derived by the application requirement,the paper also puts forward to a bilingual retrieval model on the basis of CAT/AGROVOC mapping,designs and realizes the ZH/EN bilingual retrieval prototype system.