A household electrical appliance system comprising: a first household electrical appliance; and a second household electrical appliance that performs a radio communication with the first household electrical appliance, wherein the second household electrical appliance includes: an input unit that receives an input for instructing a start of a radio setting processing for registering a communication partner to perform the radio communication; and a transmission-side radio setting unit that transmits, when the input unit receives the input for instructing the start of the radio setting processing, a radio setting request for requesting the start of the radio setting processing and carries out the radio setting processing concerning the first household electrical appliance, and the first household electrical appliance includes a reception-side radio setting unit that shifts, after power-on, to a radio setting mode for receiving the radio setting request, in the radio setting mode, carries out, when the reception-side radio setting unit receives the radio setting request from the second household electrical appliance, the radio setting processing concerning the second household electrical appliance, and ends the radio setting mode after the second household electrical appliance is registered as the communication partner, wherein the household electrical appliance system includes a plurality of the first household electrical appliances that share a power supply, and a third household electrical appliance connected to the power supply and the respective first household electrical appliances so that the power supply is supplied via the third household electrical appliance; time frames in which the first household electrical appliances shift to the radio setting mode are different from one another among the first household electrical appliances; wherein the first household electrical appliances are set based on connection positions connected to the third household electrical appliances such that time frames in which the first household electrical appliances shift to the radio setting mode are different from one another. a first household electrical appliance; and a second household electrical appliance that performs a radio communication with the first household electrical appliance, wherein the second household electrical appliance includes: an input unit that receives an input for instructing a start of a radio setting processing for registering a communication partner to perform the radio communication; and a transmission-side radio setting unit that transmits, when the input unit receives the input for instructing the start of the radio setting processing, a radio setting request for requesting the start of the radio setting processing and carries out the radio setting processing concerning the first household electrical appliance, and an input unit that receives an input for instructing a start of a radio setting processing for registering a communication partner to perform the radio communication; and a transmission-side radio setting unit that transmits, when the input unit receives the input for instructing the start of the radio setting processing, a radio setting request for requesting the start of the radio setting processing and carries out the radio setting processing concerning the first household electrical appliance, and the first household electrical appliance includes a reception-side radio setting unit that shifts, after power-on, to a radio setting mode for receiving the radio setting request, in the radio setting mode, carries out, when the reception-side radio setting unit receives the radio setting request from the second household electrical appliance, the radio setting processing concerning the second household electrical appliance, and ends the radio setting mode after the second household electrical appliance is registered as the communication partner, wherein the household electrical appliance system includes a plurality of the first household electrical appliances that share a power supply, and a third household electrical appliance connected to the power supply and the respective first household electrical appliances so that the power supply is supplied via the third household electrical appliance; time frames in which the first household electrical appliances shift to the radio setting mode are different from one another among the first household electrical appliances; the first household electrical appliances are set based on connection positions connected to the third household electrical appliances such that time frames in which the first household electrical appliances shift to the radio setting mode are different from one another.