The present invention relates to a system and method for information process using artificially constructed apparatus. More specially, in one preferred embodiment of the present invention, documents can be processed so that the most relevant terms of the contents of the documents can be obtained, and searched. In another preferred embodiment of the present invention, the present invention provides a system and method that can search for information in a document structure and provide precise results by analyzing the inputs and search results using the executing system and the knowledge structure of the think system.