A vehicle electronic key system for unlocking a vehicle includes an electronic key and a vehicle controlling device. The electronic key includes a first controller, a signal transmitting module configured to collet and transmit speech signals, and a wireless charging receiving coil configured to transmit electromagnetic signals to the first controller. The vehicle controlling device includes a second controller configured to authenticate the speech signals and unlock the vehicle, a signal receiving module configured to receive speech signals sent by the signal transmitting module and send the speech signals to the second controller, and a wireless charging transmitting coil configured to transmit the electromagnetic signals to the wireless charging receiving coil. The second controller is further configured to drive the wireless charging transmitting coil. The first controller is configured to convert the electromagnetic signals to electric energy and send the electric energy to the signal transmitting module.