Computer products ¡ACommunication products¡Aand Consumer Electronics products are the three main categories of 3C industry . With the trends of technology innovation, consumer¡¦s preference changes, and price¡¦s fluctuation, 3C products now tend to get slimmer, smaller, more easily portable, delicate, and fashionable. Moreover, advanced functions and environmental protection are also the important topics that 3C industry is facing. Accordingly, The housing parts of 3C products need to match up every inch with the above. This study focuses on the key success factors of technology innovation process of 3C housing case industry. In order to verify and refine the fist outcomes of AHP (Analytic Hierarchy Process) analysis, this study did the second AHP analysis and adopts the second outcomes as the conclusion. They are as follows: 1. These are the priorities of the four factors on the second layer: ¡§Technology Innovation Strategy¡¨ goes first, ¡§Organizational System and Culture¡¨ second, ¡§Source of Technology Innovation¡¨ third, and ¡§Investment of Technology Innovation¡¨ last. 2. The top 5 priorities of the sixteen criteria on the third layer are the below: ¡§Active Interaction with Customer¡¦s Needs¡¨ goes first, ¡§R&D Expenditures¡¦ Proportion of Sales¡¨ second, ¡§Patent Technology of Self ¡VResearch and Innovation¡¨ third, ¡§Organizational Culture of Good Communication and Flexible System¡¨ fourth, and ¡§Periodical Participation in International Technological Merchandise Fair¡¨ fifth.