A novel profilometry with color encoded projecting grating is proposed.The grating is composed of white,red,green,blue and black strips.The white strip is used as beginning strip and followed by red,green and blue strips.The black strip is placed between two color strips to increase the period of grating.Thus eight strips form a group.Changing the order of color strips,different coding groups can be got.According to the principle of permutation,there are six kinds of arrangement of color strips for R,G,B colors,and so 48 strips is in one period of the grating.By decoding processing,the shape of an object can be obtained from single image.The obtained measurement depth is even wider than the depth of field of the CCD camera.Because the strips have only two logical states,the proposed structure-light system possesses high ability of disturbance-resistance.