Metal products have characteristics of complex shapes and multi-dimensional curved surfaces. Inconsistency surface texture quality has always been a difficult problem to be tackled in traditional visual inspection, as it highly relies on operators to ensure product quality. In order to meet the requirements of the metal processed product inspection, this article will introduce the artificial intelligence inspection method developed by ITRI and its related applications in metal processing. This method solves the problem of unstable detection caused by non-uniform light source on the surface of metal products, and thus enhances the added value of the metal processing industry.