Abstract: In order to cover the shortage of OGY method that needs an adjustable parameter of the system in(advance,) a simple control method based on state feedback and parameter adjustment is proposed to stabilize the unstable equilibria of chaotic systems.The control parameter can be selected via linear control theory,and criteria for the(design) of the control parameters are also investigated.The proposed method needs neither the prior knowledge about the dynamical equations governing the system,nor any internal controlling parameters of the system.Simulation result validates the effectiveness of the proposed method.