In this study, due to DEA can easily handle multiple input and output, Taiwan financial holding company's operating efficiency are evaluated by DEA. The 14 FHCs are studied during the study period of 2002-2010. The results showed that Cathay, Shin Kong and Fubon FHC have better operating efficiency and belong to the leading group. Moreover, applying slack variable analysis to understand how inefficiency of FHCs can improve and provide operational direction of the FHCs and decision-making reference.