Abstract: To discuss the processing organization name and improving the performance of Chinese question answering system，an approach of semantic conceptual analysis based on hierarchical networks of concepts theory is adopted to remove the words which are irrelative with organization name and to get the remain as organization name candidates.After sorting the database of the full names of organizations，the matched full names was selected out from the database and sorted according to the sameness as the candidates.The experimental result shows that the accurate rate is up to 90.6%.The approach can process the abbreviation of organization name.