Nine-zone theory is optimization of reactive power control strategy which takes the operating point whether is located the superior control area as the start control criterion. Five-zone theory is one kind regulative strategy based on the movement effect, which adopts the criterion of operation quality distance and faces VQC installment. In view of the boundary blind area of five-zone theory lacks of the explicit movement criterion, this paper present nine-zone theory and five-zone theory combination control strategy.According to the most superior limiting value curve designed, it judges each substation the operating point region and start up limits of reactive power and voltage based on nine-zone theory in the entire net transformer substation. The substation over limits are adjusted using VQC device by five-zone theory. It can not only reduce the operation of control variable, but also make sure the voltage quality and optimal power flow the whole network.