The invention discloses a wiring-free electrical parameter sensor, which comprises an electromagnetic coil, a data acquisition module, an MCU, a wireless transmission module and an electricity takingcircuit, wherein the electromagnetic coil is connected with the data acquisition module; the data acquisition module and the wireless transmission module are both connected with the MCU; and the electromagnetic coil, the data acquisition module, the MCU and the wireless transmission module are all connected with the electricity taking circuit. The wiring-free electrical parameter sensor has the beneficial effects that wiring is not needed; the mounting is simple; calculation and storage of electrical parameters can be provided remotely; reference data are provided for electric energy management of an enterprise, and energy efficiency monitoring on the enterprise can be simply and conveniently carried out; and the normal operation of production of the enterprise is not influenced, and the cost of the enterprise is thus reduced.