In view of the limited channel bandwidth of wireless network control systems (NCSs), a codesign method of eventtriggered scheme, signal quantization and state feedback L2 control are proposed. Initially, in consideration of wireless network timevarying delay, an eventtriggered communication scheme is put forward, and the mathematical model of quantization control for linear systems is established. Furthermore, based on this model and by applying a new Lyapunov function and linear matrix inequality method, criterion for the delaydependent L2 quantization stabilization and criterion for the codesign of both the state feedback gain and the trigger parameters are derived. Finally, the effectiveness of the proposed method is verified by simulation.