To provide the surface decorating system of an automotive decorative part, by which decoration is made by precisely giving a pattern on the curved surface of raw material for an automotive part wile suppressing production cost.

The CPU 40 of a controller 24 produces laminatingly-coating-means driving data and, at the same time, laser-irradiating-means driving data based on a plurality of monochromatic group pattern data stored in a memory 41. The CPU 40 drivingly controls a coating device 21 based on the laminatingly-coating-means driving data so as to coat a plurality of colored layers having color elements different from one another on the top surface 3 of a resin molding 2 to form a laminated layer. The CPU 40 drivingly controls a laser irradiating device 22 based on the laser-irradiating-means driving data so as to partially expose the colored layers by peeling off the colored layers selectively and with depths different from one another in order to resultingly draw the pattern 16.