Abstract: Describes the operating principle, hardware configuation and software design of the microcomputer control system concerned.Due to the compliatcy and difficulty in the modelling of objects under control,the control system adopts an intelligent controller with baring structure, and exploits fault tolelance tolerance techniques to enhance the reliability of the system operation. Actual results show that not only the abnormality in temperatures at different sites is minimised, but the amount of energy consumption is also significantly decreased.