The performance of the DC/AC inverter control strategy has a significant influence on the voltage level of the islanded microgrid system. The traditional PI control in voltage loop cannot meet the system performance requirement under load disturbance or parameter perturbation. Aiming at this problem, a voltage H∞ robust control method for the DC/AC inverter in islanded microgrid is proposed. A centralized secondary voltage regulation is used to restore the voltage deviation caused by conventional droop control. By considering the load current as the external disturbance input, the simplified mathematical state space model of the island microgrid is established. Then, a voltage H∞ robust controller is designed by selected weighting functionsbased on the mixed sensitivity optimization problem, which can improve the ability of DC/AC inverter so that its robust performance can be optimized under the system parameter perturbation. Finally, the numerical simulation result shows that the proposed strategy is feasible and the H∞ robust controller is of the stronger stability under disturbance.