Abstract: Based on the turbine control system and its working principles, major functions, static and dynamic characteristics of the study in this paper, I have a comprehensive analysis of the turbine control system. I established a mathematical model for the main components of the turbine and digital electro-hydraulic control system for the widely used digital electro-hydraulic control system(DEH) in this paper. Then I identified the simplified object model of this system. For specific models, analog and digital PID controllers for turbine speed regulation, as well as valve servo controllers, were designed through modeling and simulation methods. And a method based on relay feedback model identification was used to tune the PID parameters, and a digital PI controller with certain robust control indicators was ultimately designed.