This paper discusses a case-based approach to teaching process control involving modeling, measuring, PID and cascade control methods. In the traditional process control teaching, there are some problems such as knowledge points are taught without any example or taught by different examples. which make student be passive to study, and it's difficult to setup the whole knowledge system. Case teaching is an efficient method to help students understand the principles of process control and get the ability to solve practical problem. CS TH model is presented for the case which involves several knowledge points of process control in this article.