Abstract: Integrating neural network with fuzzy system, an adaptive fuzzy controller using neural network is proposed in this paper. This control system consists of a fuzzy neural controller (FNC) and model network(M N N). Aweight-learning a lgorithm is presented using the gradient descent method with avariable-slopes, which is useful to accelerate learning and improve convergence. Simulation and temperature control results show that the proposed controller has good controlper formance.