An investigation of the measurement in each branch of a is studied in this article. For a manager of a bank, how to promote its operational efficiency i.e., with the least input, including manpower, material resources and etc., to achieve the maximum output (profit), is the most important thing in banking management. Since the scale of a banking organization is so huge, it is rather difficult to evaluate and compare its operational efficiency impartially and objectively. As a result, each individual branch might devote extra manpower, material resources even much more time for creating more profits, and ultimately the organization becoming too bulky, inefficiency, even lack of competitiveness. This paper chiefly confers on the study of the evaluation of operational efficiency for each respective branches of a regional bank, the method adopted in the paper is data envelopment method, the analytical subject in the text for evaluation of operational efficiency of banking branch is Bank of Kaohsiung. By means of analysis of correlation, the corresponding relationship among the input items and output items is led out, and finally the operational efficiency of each individual branch is obtained by DEA method. The management efficiency of branches of Bank of Kaohsiung is solved by the numerical, FORTRAN and IMSL.

Bank has always played an important role as capital saving and supply and demand of expenditure since long time ago in the whole financial,and it has become an essential part of our financial system.However,because of the 1997 Asia financial crisis and 2008 financial storm all over the world,the structure of domestic banks has shown bad operation quality situation under the over-competitive environment,also,the profitability and asset quality are decreasing year by year. Along with the similarity of financial products,the segment among financial practices is blurring,it can has the multiple operation effect to meet the diversified demands of customers only by the merge of industry and cross-industry integration to operate in different industry.At this time,to encourage local banks to operate in different industry and encourage financial industry to cooperate via strategic alliance,it can help to enhance competency and improve the dilemma of financial institution. 1991 is the important divide for the financial industry.The ministry of finance gave green light to the erection of sixteen banks,the lack of new practices and finance creativity,plus the effects of financial institution are confined to traditional industry,stock market,the depression of house market,the capital outflow,and the evil competitive of finance industry let the finance market decreasing,lead to the non-performing loan of banks is increasing and return on equity is decreasing.Over the past ten years,bank's interest rate spread decreased from 3% to 1% recently.The local banks,franchising guaranteed industry,1046 branches in 1991 increased to 2411 branches in 2000 and 3155 branches in 2009,if includes foreign banks' branches in Taiwan,medium and small size business banks,credit union of farmer's and fisherman's associate,Chunghwa Post Co.,the branches can up to 5973,on average,one bank can only has 3850 customers out of 23 million people in Taiwan,let the industry become red sea.After the financial storm,governments all over the world emphasize on suppressing market rate, plus the defrost of the relationship between Taiwan and China,the conclusion and sign of MOU,negotiation of ECFA,all let the difference among financial institutions decreasing,and more and more financial institutions operate in different industry,for those local financial institution not belonged to financial holding companies,it's critical for them to figure out how to create their own operating advantage. In terms of this, under the never-end competitive environment, this study got the following conclusion, economic of scale has effects on bank industry, but after the on-site interview on local banks' operating effects, do research on the main factors of banks, not only the external environment effects the profitability of branches, but manager's operation of individual project and the copy of success model, to erect cross-region local bank's optimal operating model. It has benefits on bank's overall effects¡Fthe comparative advantages can create higher value for it under the depression.