Timing device using radio frequency energy

A timing device using radio frequency energy is provided in the present invention. The timing device includes a RF wideband antenna, a rectifier and voltage pump, a temporary power storage circuit, a low power consumption microprocessor and a time display device. The RF wideband antenna is for receiving the wireless energy of the mobile signal from the base station. The rectifier and voltage pump is coupled to the RF wideband antenna, for rectifying and pumping the wireless energy to obtain an amplification voltage. The temporary power storage circuit is coupled to the rectifier and voltage pump, for storing the amplification voltage. The low power consumption microprocessor is coupled to the temporary power storage circuit, receiving the amplification voltage to perform timing. The time display device is coupled to the low power consumption microprocessor. The low power consumption microprocessor converts the time data to a display signal to control the time display device to display time.