Forest stand development in coastal region is highly related to environmental change. Morphology is one of the most important factors. This research analyzed the spatial distribution change of coastal stand in Tao-Yuan coastal from 1978 to 2004, and tried to find the relationship between morphology changing and stand development by using map overlay on GIS platform. Cadastral map of coastal protection forests was also used to examine the suitability of location planning. The results showed the forest stand of Tao-Yuan Coast have been withdrawing in 26 years due to the shoreline retreat, especially in the seacoast of Tsao-Ta and Guan-Ying Industrial Park, and the estuary of Guan-Ying River and Sao-Fan-Li River. The retreating sand dune and the bad conditions of habitats were also found as a reason to cause the vanishing forests with lower ability for dust prevention and sand dune fixation. Besides, as the boundaries of protection forest were not with the trend of stand development and coastal morphology change, it is necessary to take the proper act for boundaries modification of protection forests.