1. An image processing method, comprising: capturing the image of a road by a first camera unit; capturing a coordinate of the image of an object shown in the image of the road when the image of the object shown in the image of the body is selected; adjusting at least an aiming angle of a second camera unit according to the coordinate to make the field-of-view of the second camera unit aligned with the object; capturing the image of the object by the second camera unit; and enlarging the image of the object.