PROBLEM TO BE SOLVED : To provide a real estate managing information processing system with which information on the construction or reconstruction of real estate to be purchased or to be leased can be known.SOLUTION : When the identification information of an information demander sent from a terminal 30 is matched with identification information stored in an identification information storage means 100 inside a main device 10, real estate managing information containing at least one of an image indicating the condition of the construction or reconstruction of real estate and an explanatory sentence on the construction or reconstruction is read out of a real estate information storage means 120, transmitted to the terminal side and outputted by an output means 320 in a confirmable form.