Abstract: A universal learning network(ULN),of which the nodes are connected with one another and there are multiple branches with arbitrary time delays between any two nodes,is used to identify the typical nonlinear and long time delay system.Integrating ULN with a PID controller,this paper achieves an exact predictive control for pH neutralization process.Compared with the traditional Smith predictive control method,the ULN can be effectively used in nonlinear and long time delay systems and it is a new and effective method for controlling unknown object models.