"How to exactly overlay each kinds of topographic maps in Taiwan" is an urgent research topic of feature changes in regional geography. Usually, in GIS application, it has been proved that the Rubber-sheeting methods cannot meet the precision need of ground feature overlay. The effort of this research will based on the approach of GIS application, using MapInfo professional software as datum transformation tool, repeatedly "try and error" to find out the suitable parameters for overlaying topographic quadrangles of different periods.