Due to the rapid development of cutting technology in recent years, various types of sophisticated cutting tools are required in the market. In which the drilling tool is one of the most widely used by theindustrial sector. First, we used grey relational analysis of the drilling parameters on the SKD61 tool steel. Theselected major characteristics indexes for performance evaluationof processes is tool wear, and the corresponding drilling parameters are core, relief angle, rake angle, chisel edge angle, drill type, drill speed and feed rate.Additionally, therake angleis significant factor for drilling performancewith a contribution of 47.49%.The results of confirmation experiments reveal that Taguchi method can effectively acquire the optimal combination of drilling parameters. Hence, this confirms that the proposed approach in this study can be a useful tool to improve the drilling performance on SKD61 tool steel.