A robust adaptive fuzzy control scheme is presented for a class of strict-feedback nonaffine nonlinear systems with external disturbances based on backstepping approach. The proposed approach is only requires the approximation errors of fuzzy systems norm-bounded, and an additional adaptive term is employed to compensation approximation errors and disturbances. The designed scheme guarantees that all the signals in the closed-loop system are bounded and the tracking error is uniformly asymptotically stable. R¨ossler chaotic system is presented to illustrate the feasibility and  ffectiveness of the proposed control technique.