Abstract: In order to improve the control quality of environment control system for an airborne radar，a novel intelligent controller is designed． The proposed controller is based on a control strategy combining PID with fuzzy control．This paper introduces the principle and system components of the intelligent controller and then discusses the temperature control algorithm，which has excellent flexibility，faster response speed，strong antidisturbance ability and high robustness．The temperature control algorithm is very suitable for the control system which has the characteristics of non-linear，time-variant and large time-delay．The experimental results show that the environment control system using the new algorithm has a good control performance，satisfying the requirements of cooling or heating the airborne equipment．