This paper examines the problem of hypersonic airfoil flutter active control based on the fuzzy adaptive method. First, the system stability is analyzed according to the airfoil model with cubic structural nonlinearities and aerodynamic nonlinearities, and the Hopf bifurcation point is obtained. Then, the system′s nonlinear dynamics are approximated based on the T-S fuzzy theory. The parameter adaptive law and the fuzzy control law are designed, and all of the system′s signals are proven to be uniformly and ultimately bounded by applying the Lyapunov theory. Finally, the effectiveness of the proposed active control algorithm is verified using the simulation results.