The traditional PID control is hard to use in the great nonlinearity, lag and parameter variety of a hydro-turbine generating system. The fuzzy-control has the advantages of better dynamic response characteristic, better adaptability, faster rise time and better robust characteristic, but it causes error easily because of the limitation by fussy-control grade. This paper, through a combination of fuzzy control and PID algorithm advantages, proposes a design of fuzzy PID controller to make use of MATLAB software for hydro-turbine generating system simulation. The results show that, a suitable membership to the fuzzy PID control system, whether to run at the response speed of the system or the stability, has a distinct improvement.