This Article discusses the role of postal savings in the financial marker under the change of economic situation in Taiwan. After World War II, The national income and saving of Taiwan increase because of the economic development and trade growth. The Post Office also accumulates the postal savings about NT$3 trillion during the period of time. Its ability of attracting deposits is known of the society. The postal establishments and facilities are established in urban and rural areas even no commercial banks there. The service that is availed in all localities nation-wide helps the capitals can be combined and used efficiently. The Utilization of the large postal capital alters again and again by the changing economic situations. In the early. It was the tool of the Central Bank to control the money supply. And then, it changed to the important resource for stabilizing finance markets and promoting national reconstruction. Recently, A largest part of the amount is to provide for national midand olng-term construction funds. No matter how the capital was attracted or utilized, it always followed government's policies of economic development closely.