The problem of robust  H∞ guaranteed cost fault-tolerant control for a class of networked control system(NCS)
with time-varying delay and packet dropout is investigated. A new model is employed to represent the linear controlled plant in the NCS, a sufficient condition for a robust  H∞ guaranteed cost integrity design with failures of actuator or sensor is given in terms of a delay-dependent approach. And the design method of the optimal robust H∞ guaranteed cost fault-tolerant controllers is given with LMIs constraints. Moreover, a less conservative method is obtained due to the lower bound of the time-delay introduced in the model and appropriate free-weighting matrices introduced during the proof. A numerical example shows the effectiveness of the proposed method.