Sensor network system enables highly-reliable transmission/reception of control command and efficient band

A sensor network system comprising:

• a plurality of sensors provided corresponding to a plurality of electric equipments, the plurality of sensors respectively detecting data representing an operating state of the corresponding electric equipment and respectively controlling the corresponding electric equipment;
• and
• a control terminal transmitting a plurality of control commands at a time to the plurality of sensors through a radio communication, the plurality of control commands being for the plurality of sensors to control the corresponding electric equipment;
• wherein
• each of the plurality of sensors transmits the detected data to the control terminal and controls the corresponding electric equipment at a control timing specified by the control command.