Abstract: An AC servo system based on neuron control theory is presented. Experimental results show that the neural control mode doesn't need the Precise model of the system, therefore, it has many advantages, such as simple design and high response performance. The simulation research of the AC servo system which is non-linear, time-varied.based on neuro-fuzzy controller is done. The results of the simulation show that the performances of the system are considerably improved and it is one of the novel pathways to realize intelligent control of servo system.