Nine-point Five-state Controller and Its Simulation Research Su Yixin Zhang Wei Zhang LanlunThis paper proposes a nine-point five-state controller based on the nine-point controller, which preserves the main effects and deliminates the four subordinate effects of the nine-point controller. By use of the real meaning on each parameters and its influence on control process of the nine-point five-state controller, the parameters can be properly adjusted to acquire the best effect of control. The simulation results verify the validity of the scheme.PID-control; fuzzy control; nine-point controller; nine-point five-state controller