Fault-tolerant means the ability, when one or more than one key parts of system is faulty, the system could continuously, stably, and reliably operate and autonomously keep the specified function, or lower the function in an acceptable variable ranges, by taking corresponding method (Levis, 1987). The research of fault-tolerant technique, is originally come from the simulating to natural life’s activities. Later, for the special requirement of defense and military industry, this technique was firstly applied in large-scale computer systems (Chen, 1981; Spitzer, 1988; Sadehi, 1995). Recent years, as the industrial developed and the systems’ scale became larger and larger, manufacture (or production) safety and operation economics have been paid more and more attentions (Levis, 1987; Makansi, 1995). Thus lead to the higher requirement of reliability and effectiveness of process control systems, by which the safety and economics of manufacturing is ensured. This results in the research and development of fault-tolerant process control.In this paper, we try to give some view and comments to the present state of fault-tolerant techniques used in process control, and propose some future directions for this research.