A method and apparatus of tracing product quality to improve product safety. The method and apparatus can rapidly locate sources of product raw materials causing product quality safety incidents, which prevent further development of incidents and additional losses. The method is based on using a product production plan, and creating product raw material combinations corresponding to product batches and decision rules for determining sources of unqualified product raw materials. In response to when a product quality issue arises using the decision rules when producing products according to the product raw material combinations helps to quickly determine the sources of unqualified product raw materials and improves product quality safety.