As　the　increasing　of　vehicle,　the　problem　of　traffic　jam　is　more　prominent　and　the　real-time　traffic　recognition　systems　come　into　being.　Combine　with　the　characteristic　of　vehicle　distribution　in　congested　roads,　a　real-time　traffic　recognition　method　was　designed　and　implemented　by　visual　space　transformation　and　gridding.　This　method　can　recognize　different　traffic　situations　effectively　and　has　a　good　accuracy.　It　can　meet　the　real-time　demands.