Abstract: To solve the problem of multilingual knowledge organization in cross language information retrieval，acording to the core idea of ontoterminology that the concept has stability independent of linguistic diversity，terms in different linguistic or cultural backgrounds can represent the same concept，combined with the needs of the education field，a standardized ontology model supporting multi language retrieval is constructed based on the thesaurus of education． Hoist the retrieval of terms to the conceptual level to eliminate the ambiguity of the interconversion of different languages，properly solving the problem of cross language semantic information retrieval in education field． Finally，we used Jena API to query the ontology and build a cross language semantic retrieval prototype system． The results show that the proposed idea is feasible．

Key words: term, ontoterminology, multilingual ontology, cross language information retrieval, educational thesaurus