Abstract: Four time phases of the remote sensing images during 1990-2013 (1990, 2000, 2009 and 2013 respectively)were used to acquire the coastline information of Weihai, Shandong. Results shows that the coastline of Weihai has changed greatly because of anthropogenic activities, including land reclamation, port construction and coastal defenses projects. The main changes in coastline are detected in the Huancui district and Wendeng district where vast coastal developing activities have been done in the past few decades.