The present invention relates to a real estate registration management device, a management method, and a real estate registration management system. According to an embodiment of the present invention, the real estate registration management device comprises : a real estate information acquisition unit for acquiring real estate information intended to search from a user terminal; a registration information acquisition unit for acquiring registration information of a target real estate by accessing a real estate registration server according to the set access schedule using the real estate information; a registration information determining unit for determining if the registration information of the target real estate at a first point is identical to the registration information of the target real estate at a second point; and an alarming unit for transmitting an alarm message to the user terminal if the registration information of the real estate is different at the first and second points. By this, a user, without checking if the registration of interesting real estate is changed or not in person, can be provided with the alarm service for the change.(210) Real estate information acquisition unit(215) Real estate DB(220) Registration information acquisition unit(225) Registration DB(230) Registration information determination unit(240) Alarming unit(250) Map interface production unit(255) Map DB(260) Real estate value verifying unitCOPYRIGHT KIPO 2014