Scraping technique is one of the key point techniques in machine tool industry. But the scraping measurement standard in ISO is not strict at present. The lead red still used to measure the scraping workpieces. It hurts the workers and damages the environment. In this paper, a measurement system for scraping workpieces is presented. A laser displacement meter is utilized to measure the depth of the scraping spots and the precision 2-dimension stage is used to locate the position of the scraping spots. And then the 3-dimension of the scraping workpiece is drawn via using least square methode. Finally, the result is compared with the result of the surface roughness tester, and they coincide. The experiment results evidence the measurement system has better performance.