Adjustment method and device for optical sensor

The embodiment of the invention provides an adjustment method and a device for an optical sensor. The method comprises steps: the optical sensor determines the illumination intensity of light received by a plurality of photosensitive array elements in the optical sensor, and according to the illumination intensity, whether overexposure happens to an optical sensor of each photosensitive array element is judged; and when overexposure happens to the optical sensor, the light emitting power of the optical sensor is reduced. Through reducing the illumination intensity of light received by each photosensitive array element in the optical sensor, the optical sensor can be prevented from overexposure, and thus, a bearing carrier equipped with the optical sensor can accurately rely on the optical sensor to complete a predetermined task.