本文采用变论域自适应模糊控制理论研究四级倒立摆控制问题。首先给出四级倒立摆运动的数学模型并验证了它的可控性；然后根据变论域自适应模糊控制理论设计了关于四级倒立摆的控制器，最后给出了仿真结果。-In this paper, variable universe adaptive fuzzy control theory four inverted pendulum control problem. Firstly four inverted pendulum motion model and verify its controllability　then variable universe adaptive fuzzy control theory, four inverted pendulum on the controller, and finally the simulation results.