This study was conducted from January to May of 1988, and concerns the archaeological field study and data analysis that was conducted on the middle and upper portions of the Laonong River. The preliminary stages of this study used the theory and methodology of the sitecatchment analysis of “Dongpu Hamlet 1 site: archaeological study on early human settlement in Yushan National Park” to conduct a field study at Meishan and surrounding areas, as well as do a test excavation on the Guanshan K site. In the later stages greater emphasis was placed on site surveying, which was centered along the river; a thorough exploration of possible prehistoric sites was conducted on both sides, and the location was marked. In terms of surface excavation, only complete and representative specimens were collected from the artifact-rich site; from areas with fewer artifacts, nearly every piece was collected. 14 prehistoric sites were discovered in the middle and upper portions of the Laonong River. After surveying and test excavation, the artifacts found were primarily pottery and stone specimens.