Communication system, communication apparatus and communication method

The portable device (1) includes a communication section by wireless communication (11) in communication, a display unit (12), and controls the display unit (12) for inputting display setting appliance apparatus (3) setting input screen displayed a control unit (131), the communication unit (11) by the display control unit (131) before the setting input screen is displayed, a request signal is transmitted around the appliance acknowledgment device (3) there is a person, the display control unit (131 ) when the vicinity of the electrical equipment (3) there is a person, to prevent the display unit (12) displays the setting input screen, and causes the display unit (12) displaying a representation of appliances not accept setting input device (3) can not be set screen.