A wireless power transmitter for transmitting wireless power to an electronic device with a wireless power receiver, the wireless power transmitter comprising: a power supply unit configured to supply an input voltage; a receiving unit configured to receive a power-on signal or power-off signal from a remote controller; a sub-power supply unit configured to apply to the receiving unit power lower than that to be transmitted to the electronic device; a power transmission controller configured to generate a drive signal to supply power for the operation of the electronic device based on the power-on signal; and a power transmission unit configured to form a wireless power signal based on the supplied input voltage and the drive signal to transmit wireless power to the wireless power receiver, wherein the receiving unit is configured to, upon receiving the power-off signal, turn off the power transmission controller, thereby turning off the wireless power transmitter excluding the receiving unit while at the same time blocking the wireless power transmitted from the wireless power transmitter to the wireless power receiver of the electronic device, wherein the sub-power supply unit comprises a low power transmission controller configured to generate a low power drive signal, a low power transmission unit configured to convert the input voltage supplied from the power supply unit to a low voltage, and form a wireless low power signal based on the converted low voltage and the low power drive signal to transmit wireless low power, and a low power receiving unit configured to receive the wireless low power transmitted from the low power transmission unit, and to supply the wireless low power for the operation of the receiving unit. a power supply unit configured to supply an input voltage; a receiving unit configured to receive a power-on signal or power-off signal from a remote controller; a sub-power supply unit configured to apply to the receiving unit power lower than that to be transmitted to the electronic device; a power transmission controller configured to generate a drive signal to supply power for the operation of the electronic device based on the power-on signal; and a power transmission unit configured to form a wireless power signal based on the supplied input voltage and the drive signal to transmit wireless power to the wireless power receiver, wherein the receiving unit is configured to, upon receiving the power-off signal, turn off the power transmission controller, thereby turning off the wireless power transmitter excluding the receiving unit while at the same time blocking the wireless power transmitted from the wireless power transmitter to the wireless power receiver of the electronic device, wherein the sub-power supply unit comprises a low power transmission controller configured to generate a low power drive signal, a low power transmission unit configured to convert the input voltage supplied from the power supply unit to a low voltage, and form a wireless low power signal based on the converted low voltage and the low power drive signal to transmit wireless low power, and a low power receiving unit configured to receive the wireless low power transmitted from the low power transmission unit, and to supply the wireless low power for the operation of the receiving unit.