A mathematical model was built via experimental study upon the characteristics of open loop control on water temperature of a tank working as a container for Pasteurism.PID control arithmetic was carried out by the application of MATLAB,and PID control parameters were obtained.In virtue of these parameters,PID arithmetic using Hebb algorithm was applied to water temperature control.It was found that water temperature was precisely under control,and in disturbed state,well dynamic performance was achieved.A new method for optimum design of PID control based on Hebb algorithm for pasteurism temperature control was showcased in the paper.With this method,the quality of milk products can be improved and energy sources can be saved.