The invention discloses an intelligent gear with a state perception function. A gear body and balance weight holes are included; a transmission state monitoring device and a clump weight are arrangedin the balance weight holes; the transmission state monitoring device comprises a shell, a sensor circuit board and a power source unit; the sensor circuit board is provided with a conditioning circuit unit, a control unit, a clock unit, a storage unit and a wireless unit I; and the signal inlet end of the conditioning circuit unit is connected with an acceleration sensor unit, a strain sensor unit and a temperature sensor unit. According to the intelligent gear with the state perception function, a micro sensor is directly installed at the position, needing to be monitored, of a mechanical transmission device, the signal perception strength is large and reliability is high; due to the embedded design, the sensing system is small in volume and high in integrated degree, the intelligent gear is directly installed in a gear box, the complicated mechanical environment in a box body can be overcome, and influences by the installing space are reduced; and the beneficial effects of microminiaturization, low cost, low power consumption, high efficiency and high precision are achieved.