At present, the voltage of medium and low voltage distribution network has not been well controlled. There are some areas suffering low voltage but with normal power factor. In order to solve that problem, a voltage control method of transformer areas based on sensitivity of voltage to capacitance is proposed. This method takes actual reactive power of a capacitor into consideration. First, a method for calculating the sensitivity matrix of voltage to capacitance is given and based on which a novel remote-control strategy of low voltage capacitance is proposed. Finally, the effectiveness and rationality of the voltage control strategy is verified by the simulation of the IEEE-33 node distribution network.