This　paper　introduce　the　technology　of　electromotor　control　and　protective　electrical　appliance　intelligent,　using　the　artificial　fish　swarm　algorithm　(AFSA)　which　is　based　on　genetic　algorithm　to　optimize　the　calculate　of　the　intelligent　ac　contactor.　According　to　the　result　of　optimization　design,　we　have　made　a　showpiece,　after　the　test　and　experimentation　of　the　prototype;　finally　we　got　results　as　follow:　firstly,　the　disjunction　time　of　the　ac　contactor　has　been　largely　reduced.　Secondly,　the　stability　of　the　breaking　time　of　the　three-phase　terminals　has　been　greatly　improved.　Thirdly,　the　reliability　of　zero-current　breaking　also　has　been　obviously　enhanced.　Controllable　and　protective　appliance　can　optimize　the　control　of　the　ac　contactor　during　the　period　of　start　process,　close　process　and　break　process.　Especially,　when　we　use　zero-current　breaking　technology,　we　realized　the　three-phase　contact　terminals　break　with　little　arc,　besides,　the　electromotor　protector　included　these　protective　function　characters　such　as:　overvoltage,　under-　voltage,　blocked,　overload,　unbalanced,　lose　phase　and　etc.　It　can　display　the　time　of　the　line　voltage　and　the　three　phase　current　of　the　electromotor　and　it　can　realize　intercommunication　with　the　host　computer.　©2010　IEEE.