Mother Board industry is studied in this research. Base on STP and QFD theories, Product Function Matrix use to analysis the relations between PRC Personal Computer market and products. After analysis and understanding the segments and products throw Product Function Matrix analysis. It will find a new function of products, which will meet new market segment. The major steps as following: 1. Analysis and understanding the Personal Computer segments in PRC and which current suitable function of products. 2. Sort and analysis the products by different class, and make a Product Function Matrix which according to the segments and different function of products. 3. Base on Product Function Matrix to do research, it will find a new products and it will meet the new segments. 4. Discussed and confirmed with product planner which in M company. It’s make sure this research is workable.