In　order　to　solve　intercommunication　problem　between　IPv4　network　and　IPv6　network　more　flexibly,　this　paper　has　proposed　an　improved　IPv4-IPv6　translator　based　on　embedded　system.　By　using　an　optimized　address　mapping　regulation,　it　can　support　both　stateful　and　stateless　translation　method.　In　addition,　a　lightweight　SIP-ALG　and　Modbus-ALG　have　been　designed　to　assist　the　translator　to　process　the　datagram,　which　may　take　address　and　domain　information　at　the　seven　layers　of　OSI　model.　The　results　show　the　translator　can　work　well　between　sensor　network　and　Internet,　and　the　mixed　use　of　stateful　and　stateless　method　has　much　less　memory　usage　than　stateful　method　and　nearly　the　same　process　delay　as　stateless　method.　©　2014　Springer　International　Publishing　Switzerland.