The invention relates to an asynchronous motor optimization device, comprising a casing, a stator, a rotor and a controller, wherein the stator is disposed in the casing, the rotor runs through the stator, and the controller is disposed in the casing and is electrically connected to the stator; the controller is internally provided with a target rotational speed acquiring unit, a rotational speedmeasuring unit and a speed regulating unit, wherein the target rotational speed acquiring unit is configured to acquire the rotational speed of the target, the rotational speed measuring unit is configured to measure the current rotational speed of the rotor, and the speed regulating unit is configured to control the rotor to operate at the rotational speed of the target according to the rotational speed of the target and the current rotational speed. The asynchronous motor optimization device enables the asynchronous motor to operate in a superior state.