No-arc　closing　and　breaking　of　contactor　is　a　main　method　of　reliable　operation.　With　the　high-speed　development　In　power　electronics　technology,　computer　technology　and　electrical　apparatus　technology,　it　is　possible　for　the　contactor　to　realize　no-arc　closing　and　breaking　operations.　This　paper　presents　operation　principle,　experiment　results　of　intelligent　AC　contactor　and　DC　contactor.　Their　structure　can　be　simplified　further.　The　contactors　not　only　realize　no-arc　dosing　and　breaking,　but　also　will　have　higher　electrical　endurance,　operating　frequency　and　better　performance　indexes.　The　operation　dependability　of　contactor　improves　greatly,　and　realizes　saving-material　(especially　silver)　and　saving-energy.　In　addition,　the　contactors　have　some　other　functions,　such　as　fault　alarm　and　communicate　with　the　monitor　computer　system,　etc.