By means of GIS and remote sensing technique, the changes and evolvements characteristics of foreshore and deep channels of Lingdingyang Bay in Pearl River Estuary are analyzed. The causes for change and consequences are also illustrated. Based on this, it reminds us of standardizing the development behavior to the coastal area in favor of the long term development of Pearl River Delta from the sustainable development high points of coastal area.hromic devices was fabricated with tungsten of the device such as coloration effciency and response of device were also measuuured. Key words:electrochromism;coloration efficiency;response time;coloration threshold potential