The technique of GIS has been used in diverse applications. This study analyzed with the use of GIS technique how the branch-banks of Taegu undergone locational changes. Locational changes of the branch-banks in a city have great significance in such disciplines as urban geography and urban planning. The location of the blanch-bank plays a major role in the urban study to represent the flow of layer-by and producer under the commodity economy and find spatially out the shift of the economy gravity of urban center. But there have difficulties in the difficulties research on locational changes of the branch-bank with traditional map overlay techniques. The technique of GIS allowed to overcome there difficulties beyond the limits of traditional research methods.