Abstract: Presents a new uncertain switched fuzzy system in which all subsystems are fuzzily uncertain. Differing from the conventional switching fuzzy systems which are all of two-level architecture, the new system consists of several subsystems and they switch on/off each other. Studies the robust tracking control of uncertain switched fuzzy systems by multi-Lyapunov functions. Taking account of the external disturbance whose upper bounds are unknown, the global robust controller and its adaptive law are designed with the relevant switching strategy given to enable the tracking error of the system to approach to zero uniformly asymptotically. Simulation indicates that the transient response of the system is improved when combining the slow adjustment of adaptive parameters with quick adjustment of switching law.