In　this　paper,　the　ARM　embedded　fire　alarm　controller　is　designed　and　applied　to　the　fire　intelligent　video　surveillance　system　of　large　space.　Based　on　the　Modbus　communication　protocol,　the　fire　alarm　controller　receive　the　information　from　video　surveillance　platform,　sending　out　alarm　signal　of　voice　and　light　when　fire　happened,　and　then　the　fire　sprinkler　system　are　controlled　to　extinguish　a　fire　automatic.　Aimed　at　the　flaws　of　the　object　extraction　algorithms　in　intelligent　video　signal　processing,　the　improved　method　has　been　proposed.　Finally　the　system　experiments　are　carried　out.　The　results　of　experiments　show　the　large　space　fire　alarm　controller　based　on　intelligent　video　surveillance　has　good　performance　both　in　reliability　of　fire　monitoring　and　in　real　time　of　alarm　and　fire　control.　©　2011　IEEE.