Mt. Sinkang is situated in the eastern part of Yushan National Park, and is the southern end of the Central Range marble. According to legends, Walami in the central part of the park has high-quality marble; therefore, there is a lot of pressure from the mining business to open the area up. This geological survey was conducted in order to better manage this area as well as to fulfill the educational function of the park. The focuses of the survey included: a broad survey of geological and mineral resources, collection and explanation of rock specimens, slide explanations of the topography, geology, and lithology of the area, engineering geological evaluation, and explanations of environmental impact. The study showed that due to the cutting erosion of flowing waters, the topography in this area is extremely complicated and steep, and is not considered an ideal place for construction related activities because of the geological constraints posed by the surrounding environment. Safety costs and spending on construction activities such as mining and road-building in this area would be considerably higher than normal, not to mention the serious consequences for the natural environment. Although there are three layers of marble in the area, all the layers are sandwiched at a sharp angle between schist, so choosing and opening mines would pose a considerable challenge. In addition, mining and transportation costs would be higher than normal because of the high location of the area and the absence of roads. Geological data showed that there is a limited amount of white marble in the area. Because the marble is not exposed, the quality and quantity are hard to predict.