The datum TWD67 and datum TWD97 are both currently used as coordinate systems in Taiwan. With the National Geographic Information System being developed and established, the government is providing different kinds of digital maps to the public. The integration of the two datum coordinate systems becomes a very important task for smoothly using the digital maps. Because measurement methods adopted by the datum TWD67 and datum TWD97 are different, the transformation of the coordinates involves not only geometry but also human errors from measuring. This research paper proposes genetic planning to conduct coordinate transformation, in which an algorithm of adaptive evolution is used. This provides a set of transformation formula which utilize digital maps between two different planar coordinates in Taiwan. This helps the integration and applications of digital maps in the datum TWD67 and datum TWD97.