Abstract: The invention involves an intellectualized polarity identification device which comprises an electromagnetic module connected with a control circuit. The electromagnetic module comprises a magnetic inductor (electromagnet), a movable contact plate coaxially set with the magnetic inductor (electromagnet) and stationary contact plates. The control circuit comprises a reversed-polarity alarm protecting circuit connected with a correct-polarity conducting circuit. The reversed-polarity alarm protecting circuit comprises an alarm circuit and a protection circuit, the protection circuit comprising a diode and a photocoupler. The correct-polarity conducting circuit comprises a conduction circuit and an indicator circuit, respectively connected with the photocoupler. The intellectualized polarity identification device is electromagnetically controlled such that a closed circuit is created only when the device is connected with the correct polarity.