From　the　viewpoint　of　demands　on　traffic　facility　management,　this　paper　establishes　traffic　sign　encoding　contents　and　encoding　rules　based　on　investigations　and　interviews.　Encoding　method　follows　the　principles　of　uniqueness,　stability　and　simplification.　The　connection　of　traffic　signs　and　support　structures　is　considered　and　encoding　contents　are　integrated　with　geographical　positioning　effectively.　Firstly,　the　encoding　contents　are　divided　into　four　parts,　including　location　codes,　classification　codes,　serial　codes　and　property　codes.　Secondly,　the　encoding　structures　and　encoding　rules　are　established　for　the　four　parts.　Finally,　a　specific　case　of　traffic　signs　encoding　is　shown.　This　encoding　technology　will　provide　a　theoretical　basis　for　the　traffic　signs　RFID　(Radio　Frequency　Identification)　research　and　provide　technical　support　for　science　and　information　management　of　traffic　sign　system　in　urban　area.