Abstract: This paper introduces the details of the adaptive control scheme, error analysis and field adjustment of a hydraulic cauldron control system. A kind of new adaptive predictive control scheme is designed based on the all-coefficient adaptive control theory and model predictive control theory. The stability of this control algorithm is proved, and the analysis of error in stable stage and analysis of dynamic performance in the closed loop system are given. The actual application shows that the method proposed in this paper has good robustness to model error, system delay and measure noise.