Abstract: Investigates the problems of robust output-feedback control for a class of uncertain discrete switched fuzzy systems with time-delay. A state observer is constructed when the states are immeasurable. Supposing that each and every subsystem of the switched system is fuzzy system, the multiple Lyapunov functions method is adopted for the system state with the common Lyapunov function method used for the observer error to design the switched control law. And the PDC (parallel distributed compensation) algorithm is used to design the fuzzy output-feedback controllers, thus enabling a closed-loop system to provide robustness for all admissible uncertainties in the feedback controller designed and in accordance to the switched control law designed as above. A simulation example shows the feasibility and effectiveness of the design method.