The present invention discloses a tire impression depth data processing method, system and device. The method comprises: collecting a plurality of light bar images by projecting on a tire through a laser beam; obtaining the first coordinates of each pixel point on the light bar in each light bar image, wherein the first coordinates are a two-dimensional coordinates of each pixel point on the light bar; performing coordinate transition of the first coordinates of each pixel points to obtain second coordinates of the collection points on the tire, wherein the second coordinates are three-dimensional coordinates, and the pixel points are in one-to-one correspondence with the collection points on the tire; and determining the impression depth data of the tire according to the height dimension in the second coordinates. The problem is solved that the measurement precision of the impression depth data of tire measurement is low in prior art, and the measurement precision of the impression depth data of tire measurement is improved.