The purpose of this study is to suggest an efficient model for quality improvement that could actually develop process quality and acquire quality confidence by examining problems in the processes to remove inefficient factors through collection and analysis of quality data in automobile parts manufacturing processes. It could be performed the functions by interfacing a control computer and PLC to CNC (computerized numerical control) machine to support real-time communication among these machines. As a result of the test between the main Server and the PLC, it is noted in case of the automation by PLC that the effects of proposed model are as follows: (a) the handling time for quality data by current method was 30minutes, but (b) the handling time by proposed method was 10seconds.