In　Intelligent　Transportation　Systems,　moving　shadows　have　always　been　wrongly　detected　as　foreground　objects,　thus　causing　bad　effect　on　the　latter　targets　tracking　and　identify.　In　order　to　subtract　the　shadows　lie　in　different　circumstances,there　has　put　forward　a　method　of　moving　shadow　detection　based　on　Image　edge　detection　which　using　Susan　algorithm[9].　After　getting　the　background　with　mixture　Gaussian　distribution,　the　moving　foreground　position　can　be　accurately　obtained　via　the　background　subtraction　method,　then　use　the　Susan　algorithm　to　detect　the　image　edge　in　interested　area.　Finally,　do　shodow　detection　by　analyzing　the　statistic　characteristics　of　edge　pixels.　According　to　the　experiment,　this　method　is　easy　to　operate　and　possesses　high　rate　of　accuracy,　low　rate　of　complexity,　and　well　adapt　to　different　kinds　of　shoadow　distribution.　©　2011　IEEE.