The　AC　electromagnetic　valve　is　always　used　in　air-conditioning　system　and　refrigerating　system,　it＇s　compact　structure,　small　volume　and　totally　closed.　This　paper　designs　an　intelligent　control　module　for　the　AC　electromagnetic　valve,　and　this　module　uses　off-line　switched-　mode　power　supply　chip　as　a　core.　The　chip　can　dynamic　self-supply　with　a　few　discrete　components,　and　can　realize　intelligent　control　of　the　electromagnetic　valve.　With　the　module　control,　the　AC　electromagnetic　valve　can　have　the　functions　as　follows:　AC　or　DC　general　use,　wide　range　input　voltage,　working　silent　and　saving　energy,　perfect　protection　performance,　etc.　The　AC　electromagnetic　valve　can　start　and　keep　with　closed-loop　in　DC　mode　without　any　auxiliary　power　supply.　This　paper　analyzes　the　principle　of　the　closed-loop　starting.　The　experimental　results　verify　the　validity　of　the　control　module.　The　small　module　can　make　the　AC　electromagnetic　valve　more　robust　and　improve　the　service　life　at　a　low　cost.