PROBLEM TO BE SOLVED : and the object of the application to provide the desired self-tour estate Web site of rental information from a user, and collectively performing a collection of information can be collected to a questionnaire replier, closing control information submitted for the implementation of the electric lock, self-tour of real estate. SOLUTION : the property and a lock arranged at 1, and the electric lock 1 closing state of the opening/closing control of the control device 2 and, the control unit 2 based on a signal sent from the state grasping the state of the electric lock 1, which controls the opening and closing of the electric lock 1 logicality lock management server 6 and, Web server 9 and provide a Web service, the management server logicality lock 6, the Web server 9 and in communication, and the open/close state of the electric lock 1 tour reservation property by the person scheduled, after the collection of information submitted questionnaire to collectively and management server 10, having the general control system. Selected drawing : fig. 1