From 1990 to 2006, accompanying with the development of mold and tool machine industries, the number of Taiwan heat treatment processing enterprises had increased from around 30 to 364. And the customers of heat treatment prefer to reduce manufacturing cost; they proceed to install heat treatment furnaces and learn the heat treatment technique. Based on above reasons, customers of heat treatment are losing gradually. The above caused price competition in and profit diluting. So, enterprises have to consider how to make use of advantages of material selection and heat treatment to transform the business toward self-brand or high value-added industry. Finally, to get rid of the destiny of traditional processing industry is the main goal of the research. The research tries to find out the key success factors of its transformation. It firstly collected relative document records to find out proper factors. Secondly it consulted 3 specialists and sifted out the first-phase factors. Thirdly it used AHP questionnaire to consult 11 experts and gather second-phase statistics. The purpose of above activities is ordering the priority of importance. The consequence reveals the top ten business transformation key success factors of heat treatment processing industry is listed as following by order:(1)core technique;(2)increased operating profit after allying;(3)skill¡Bexperience¡Badapting capability¡Band company loyalty of employee;(4) scale and future of market;(5)competition of manufacturing cost;(6)managing team capability;(7)support from high level manager;(8)increased industry competition after allying;(9)competition of present competitors;(10)bargaining power of buyers.