For industrial producing of PAN based carbon fibres, the large-scale pre-oxidation furnace is the key equipment. In this paper, we proposed a new architecture of a set of control systems based on programmable computer controller (PCC) and a fuzzy self-adaptive PID controller to improve the precision of temperature controlling. This controller can not only retain the advantages of conventional PID controller but also can tune online PID parameters according to fuzzy logics. The experimental results show that the proposed controller has the advantages of fast response, small overshoot and high accuracy. The control accuracy is between -1 and 1 degree C which meets the requirements of high performance carbon fiber production.