Abstract: The life of prehistoric people was highly depending on their surrounding physical environment. They have produced material culture (artefacts) in a very simple form and function which could help them to meet the needs of their everyday life. Adaptation to environment is a solution in their modest culture. Reconstruction of physical environment, therefore is essential for prehistoric archaeological research. The method used in this study was survey on prehistoric sites at Belae-Pangkep, through observations on environmental and adaptation variables of prehistoric people in the past. The results show that the environment has karst characteristic which located at a transition area from freshwater to saltwater between coastal and land area. Prehistoric people lived with adaptation patterns to these different environmental phenomena.