This　paper　presents　the　algorithms　to　locate　license　plate　and　recognize　the　characters　on　it.　These　algorithms　have　three　advantages.　First,　they　have　strong　robustness　to　against　many　noises　and　disturbances.　Second,　the　methods　can　deal　with　license　plates　with　different　colors.　Third,　the　recognition　methods　based　on　artificial　neural　network　are　suitable　for　Chinese　characters.　©　2009　ACADEMY　PUBLISHER.