An information apparatus searches content that is stored in a database by using a search engine based on a newly input keyword; acquires a search operation history of the content that is acquired by the search engine via an operation history engine; and updates the keyword associated with the content that is registered in the database by collating the search operation history and the newly input keyword. While adding of the inappropriate search information (keyword) is prevented, the appropriate search information can be automatically updated and set to the content.