The invention discloses a laser radar adjusting system and method. The laser radar adjusting system of the invention comprises an adjusting light source, a camera, and a detection device of a laser radar. The laser radar detection device includes a laser detector and a laser emitter. The camera is located in a light path of a light beam emitted by the laser emitter, and the light beam emitted by the laser emitter can be imaged on the camera to form a first light spot. The adjusting light source is used for illuminating the laser detector, the laser detector can be imaged in the camera when thelaser detector is illuminated by the adjusting light source, and a second light spot is formed. The position of the laser detector can be adjusted to adjust the distance between the first light spotand the second light spot.