A switch device for a controlled device, comprising: a receiving conversion component, which is configured to receive a wireless signal and to convert the received wireless signal into a power supply signal; a first power component, which is connected to the receiving conversion component and is configured to store electrical energy based on the power supply signal; a control component, which is connected to the first power component and is configured to enter a working state based on the electrical energy supplied by the first power component and to generate a control signal in the working state; and a first switch component, which is connected to the control component and is configured to change to be in an on state or an off state according to the control signal; wherein the first switch component is configured for being arranged on a power supply loop of the controlled device to which a second power component is configured to supply electrical energy in the on state; characterized in that the switch device further comprises: a second switch component, which is disposed in series with the first switch component on the power supply loop, and is connected to the first switch component and the control component respectively; wherein the second switch component is configured to change a switch state according to a user operation on the second switch component; wherein the control component is configured to output the control signal to the first switch component according to the switch state of the second switch component and a wireless control signal including a user instruction; wherein the first power component is configured to supply the stored electrical energy to the first switch component. a receiving conversion component, which is configured to receive a wireless signal and to convert the received wireless signal into a power supply signal; a first power component, which is connected to the receiving conversion component and is configured to store electrical energy based on the power supply signal; a control component, which is connected to the first power component and is configured to enter a working state based on the electrical energy supplied by the first power component and to generate a control signal in the working state; and a first switch component, which is connected to the control component and is configured to change to be in an on state or an off state according to the control signal; wherein the first switch component is configured for being arranged on a power supply loop of the controlled device to which a second power component is configured to supply electrical energy in the on state; characterized in that the switch device further comprises: a second switch component, which is disposed in series with the first switch component on the power supply loop, and is connected to the first switch component and the control component respectively; wherein the second switch component is configured to change a switch state according to a user operation on the second switch component; wherein the control component is configured to output the control signal to the first switch component according to the switch state of the second switch component and a wireless control signal including a user instruction; wherein the first power component is configured to supply the stored electrical energy to the first switch component. a second switch component, which is disposed in series with the first switch component on the power supply loop, and is connected to the first switch component and the control component respectively; wherein the second switch component is configured to change a switch state according to a user operation on the second switch component; wherein the control component is configured to output the control signal to the first switch component according to the switch state of the second switch component and a wireless control signal including a user instruction; wherein the first power component is configured to supply the stored electrical energy to the first switch component.