GIS(geographic information system) is there any interesting new field that we can apply it?

It depend on your interest. Nowadays almost every field that related to earth (have spatial information) can be applied with GIS. GIS itself is a system that grow rapidly. Everyday there's new technique, tools and system that developed to enrich GIS to became very powerful system. I my self, very interested with open source GIS like GR and Mapserver. To learn more GR you can visit a href="http://www.ossgis.co.cc" rel="nofollow"http://www.ossgis.co.cc/a