Considering the characteristic of the quadruple-tanks,such as multiple variables,great time-delay,misalignment and coupling,the author applies the wavelet neural network generalized predictive control(WNNGPC).Predictive model of the control system can be obtained through recognizing the system controlled object based on the good function approximation of the wavelet neural network.And with the combination of the good control performance of the generalized predictive control,the quadruple-tanks system can ac...