The invention relates to a wireless digital electric field strength monitoring sensor which consists of a shell body, a power supply circuit, an electric field effect element, an amplifier circuit, an impedance conversion circuit, a quantity value judgment circuit, a power supply control circuit, a PCB (Printed Circuit Board), a singlechip computer circuit, a wireless communication module circuit and an antenna, wherein the power supply circuit, the electric field effect element, the amplifier circuit, the impedance conversion circuit, the quantity value judgment circuit, the power supply control circuit, the PCB, the singlechip computer circuit and the wireless communication module circuit are mounted in the shell body, and the antenna is mounted outside the shell body. The wireless digital electric field strength monitoring sensor has the advantages that the monitoring sensor can detect whether high-voltage equipment is charged or not, can detect the voltage level of a charged body, and can realize lightning and surge discrimination.. The monitoring sensor is small in volume and can be mounted on equipment to be detected without influencing the service function of the equipment to be detected; and the monitoring sensor has another advantage of simple structure, and the number of elements in use is less, so that the manufacturing cost of the sensor is reduced.