For a linear time-invariant system with bounded system noise, the robust control problem based on event-triggered communication quantizer is studied in this paper. By using robust control theory and linear matrix inequality (LMI) technique, a sufficient triggering condition is proposed to guarantee the given level of robust disturbance suppression. The Lyapunov criterion for asymptotic stability analysis and event-triggered method for controller design are established. In this process, event-triggered scheme and controller are designed in collaboration. In addition, the lower bound of event-triggered interval is given, and it is proved that the proposed method can naturally avoid Zeno behavior. Finally, a simulation example is given to verify the effectiveness of the proposed method.