In　the　integrated　mode　of　power　grid　dispatching　and　control　centralized　monitoring,　the　dispatchers　need　to　prioritize　events,　determine　fault　types　and　propose　solutions　timely　and　accurately,　which　puts　forward　the　high　requirements　on　the　operational　ability　and　the　response　level　of　the　dispatchers.　To　relieve　the　working　pressure　of　the　dispatchers,　a　grid　dispatching　ontology　knowledge　base　based　on　the　ontology　theory　and　the　dispatching　rules　is　built　in　this　paper,　which　realizes　information　search　and　query　with　conciseness,　preciseness,　and　rapidity.　The　instantiation　of　the　power　grid　dispatching　knowledge　ontology　can　provide　decision-making　assistance,　information　query　and　verification,　emergency　handling　and　other　functions.　©　2019　IEEE.