PROBLEM TO BE SOLVED : To solve the problem that the difference between the day when a photograph is actually taken and the day when the owner confirms the photograph is apt to becomes large and the quality of information becomes low when the photograph, etc., is sent by mail to inform the owner of the state of real estate which is managed instead of the owner. SOLUTION : While information regarding real estate is held secret to others, a user confirms the latest management state at desirable time by sending management state information including photographs, etc., to a terminal connected through a network.