Abstract: Analyses the problem of searching business information in electronic commerce (EC) environment, and proposes a search method using Hopfield neural network with Internet as information source through artificial intelligence (AI) and information retrieval (IR) theory. In this method the features of business information are represented in terms of connection weights. A set of extended query terms are generated automatically by Hopfield neural network in accordance with the query keywords the users input. Searching general-purpose search engine (GSE) with those extended query terms and ranking the results, the proposed method can expand the search scope and improve the search precision so as to provide valuable business information for enterprises.