To provide a system and its method for receiving inquiries for personal histories or performing certification of histories collectively.The present invention provides an authentication history certification system for certifying a personal history on a computer system, including a history acquisition means (122) for acquiring and recording histories, a history verification means (123) for making a history inquiry or verification with an organization authorizing the history to verify whether or not a personal history is authentic, a history extraction means (124) for extracting and displaying a history, and a history certification means (125) for certifying a personal history defined by a history extracted from history data recorded and managed.