International investments involve currency exchange. Exchange rate uncertainty is a risk which affecting performance of international portfolios. In order to reduce this risk, we introduce five different currency hedge strategies (100%, 75%, 50%, 25% and 0% hedge) and consider hedge cost in our study. We try to find the most efficient currency hedge strategy for international portfolios and to give suggestions for Taiwan investors. In our study, we simplify the Taiwan Labor Pension Fund (DC Plan) asset allocation as our international portfolio. Select the time period from 2007 to 2013. We find that 25% hedge is the dominate strategy for existing asset allocations weight in the Taiwan Labor Pension Fund (DC Plan). By using 10 years forward looking return, we find that no hedge is the dominate strategy.