The　application　of　extension　theory　in　the　domain　of　electric　power　dispatch　control　and　anti-misoperation　is　studied.　The　essential　knowledge　base　of　dispatch　control　and　anti-misoperation　is　developed　and　the　intelligent　deduction　technology　based　on　rhombus-thinking　model　is　proposed　for　the　generation　of　operation　orders.　The　publish/subscribe　mechanism　is　adopted　to　completely　share　the　models,　graphics　and　data　of　dispatch　control　system　and　the　intelligent　topology　analysis　is　applied　to　realize　the　multi-layer　check　service　of　misoperation　prevention.　An　integrated　dispatch　control　and　anti-misoperation　system　is　developed　based　on　D5000　platform,　which,　with　higher　anti-misoperation　efficiency,　adapts　to　the　line　connection　type　change,　power　grid　capacity　expansion　and　operation　mode　change.