This　paper　shows　one　kind　of　Intelligent　No-Arc　Motor　Starter　control　principal.　Intelligent　No-Arc　Motor　Starter　(NAMS)　is　a　new-type　control　and　protect　low-voltage　electric　apparatus,　which　composed　by　a　new-type　intelligent　hybrid　AC　contactor　module　and　an　intelligent　motor　protector　module.　Therefore,　it　has　AC　contactor　and　motor　protector　function.　In　the　new-type　intelligent　hybrid　AC　contactor,　the　contact　of　each　phase　connected　with　only　one　unidirectional　SCR　in　parallel　finishes　no-arc　closing　and　breaking.　So　the　cost　of　the　no-arc　AC　contactor　is　reduced　greatly.　It　has　high　performance-cost　ratio　and　the　structure　of　extinguishing　chamber　will　also　be　simplified.　The　intelligent　motor　protector　has　over-voltage,　under-voltage,　locked-rotor,　over-load,　imbalance,　phase-break,　ground-connect　protects　function　and　so　on　.It　has　full　protected　function,　simple　parameter　setting,　safe　and　dependable　performance.　In　the　paper,　by　using　the　neural　network　to　predict　the　winding　of　the　motor　temperature,　improve　the　function　of　protecting.　This　kind　of　switch　use　may　enormously　enhance　the　system　operate　reliability.