Abstract: A model of a class of uncertain switched fuzzy systems is developed, in which each and every subsystem is uncertain and fuzzy, and the robust stabilization of the uncertain switched fuzzy system is studied. When the upper bounds of external disturbances are unknown and the actuator seriously failed insomuch that its undamaged parts are unable to keep the system stable, a robust, reliable and fuzzy adaptive controller is built using the switching technique and multiple Lyapunov function method to enable the relevant closed-loop system to be uniformly ultimately bounded for all possible uncertainties and all actuators of which the failure is permissible. Moreover, the switching law is designed to enable an uncertain switched fuzzy system to be uniformly ultimately bounded. Simulation results showed the feasibility and effectiveness of the method.