An automatic load shedding scheme considering the pumped-storage units at Taiwan Power Company (Taipower) is proposed in this paper. The present Taipower owns ten pumped-storage units which can be shed with higher priority when operated in pumping mode in order to restore the system frequency; In this way, the amount of customer load required to shed can be significantly decreased. The system reliability and stability can be also enhanced, In the paper, a load frequency control model is developed, An automatic load shedding scheme that is adaptable to Taipower operation is thus developed. The proposed method has been validated through the utility data and compared with the utility shedding scheme. Test results solidify the feasibility and effectiveness of the proposed method for the applications.