Abstract: Aim at problems like the large high energy consumption,the unstable product quality and the simple control system of the low grad synthetic scheelite equipment in China.According to the process requirements of the alkali autoclave process for scheelite,the temperature mathematic model is established;take temperature in reactor as the mian,temperature of jacket as the supplementary,the cascade control system is constructed;based on using adaptive fuzzy adaptive controller to choose the optimal parameters,developed the intellective control system which based on the temperature of singlechip and the automation of alkali autoclave process for scheelite is realized.Simulation experiments showed that fuzzy adaptive PID control system has characteristics of quick response and good fault tolerance;application of the temperature control system of cascade control can overcome the lagging effect of reactor and achieve precisely control of temperature in reactor,it also ensure the stability of product quality.