This paper discussed transformation and upgrading of digital control processing systems. Based on an analysis of current digital control lumber processing systems in China, both the problems and solutions were reviewed. Specific points that were covered included the design structure of the system, overall function, programming, network, and process operation. After upgrading and transformation, the digital control systems did not only maintain the original precision and function, but also had gained modern capabilities such as network communication, data transmission, CAD, CAM, and simulation, that made its function and performance meet the standards of modern science and technology.