MANAGEMENT SYSTEM, MANAGEMENT METHOD, OPERATION TERMINAL AND CONTROL DEVICE

A management system comprises an operation terminal configured to perform a remote operation of an equipment; and a control device configured to receive an access request from the operation terminal and transmit a request command to the equipment in response to the reception of the access request. The operation terminal comprises a user interface configured to notify a user of information specifying an expiration timing of a response waiting timer that defines a transmission interval or a reception interval of the request command.