A control processing method of an electric device for implementing an operation content indicated by an operation command received from a control terminal, the method including a step of discriminating whether the received operation command is a predetermined operation command, and a step of notifying the control terminal that the operation content indicated by the operation command has not been implemented without implementing the operation content indicated by the operation command, in a case where the received operation command is the predetermined operation command. Therefore, in a case where a command specification of an industry standard is designed, although the electric device receives an unsupported command, it is possible to obtain that the electric device is smoothly controlled.