The problems of modeling, analysis and control for variable sampling networked control systems (NCSs) with induced delay and signal quantization are studied in this paper. A more general mathematical model for such NCSs is built. A new Lyapunovfunctional which is dependent on the bound of network delays and the bound of sampling intervals is constructed, and introducing some relax variables technology is used to effectively reduce the conservativeness of the stability conditions brought by those factors of delays, quantization errors and variable samplings. Furthermore, the quantitative relation of those three factors and stability is presented, and the design method for dynamical quantization controller is given. Numerical example illustrates the effectiveness of the proposed method.