An　electric　heat-tracing　control　system　which　will　be　applied　to　the　oil　pipeline　is　researched　in　this　paper.　The　system　has　the　function　of　system　configuration,　heating-circuit　control　and　online　monitoring.　It　is　made　up　of　controller　station,　controller　net　and　RTU　module.　When　it　works　in　the　real-time,　the　system　not　only　can　monitor　the　temperature,　current　and　the　status　of　breaker,　but　also　can　configure　and　control　every　electric　heating-circuit.　A　well　functioned　trouble　detecting　and　alert　solution　is　also　applied　to　the　system.　RS485　Bus　and　Ethernet　LANs　have　been　used　to　connect　all　the　different　levels　within　the　system.　The　results　of　experiments　show　that　the　electric　heat-tracing　control　system　has　realized　the　management　and　control　of　the　heat-tracing　in　a　specific　region　through　network,　information　technology　and　integration.　As　well,　it　has　good　performance　both　in　reliability　of　system　monitoring　and　effectiveness　of　heating-circuit　control.　©　2012　Chinese　Assoc　of　Automati.