The Si Mo furnace used for sintering laboratory sample material and performance test is a kind of high inertial control object. The author designed the experiment rule controller and PID controller for the Si Mo furnace, and one of the controllers was selected according to the temperature differential degree, and thus the effective control of the furnace temperature is realized. The temperature measurement error(e m)of this control system is equal to or less than 0.1 deg C;and the static control error (e...