1. A commercial information search system, comprising: an information center which comprises an information database storing a plurality of web data characterized by a plurality of languages respectively, wherein said information center is adapted for a user accessing through a public communication network; and a search interaction platform communicatively linking with said information center, wherein when a search request with a selected language is sent to said information center through said public communication network, said information center sorts out said web data to match with said search request to generate a search result based on said web data with said selected language, so as to eliminate unrelated web data with other languages being translated into said selected language to be shown in said search result.