Parameters　management　and　analysis　are　the　basis　for　units　running　and　revamping.　They　also　provide　scientific　guidance　for　studying　chemistries　and　dynamics　of　catalytic　cracking　reactions.　So　far,　each　FCC　unit　is　in　the　status　under　dispersing　management　and　lack　of　specified　collection　and　management　of　parameters.　Therefore,　the　parameters　resource　could　not　be　shared　among　each　other　so　as　to　bring　much　trouble　in　establishing　a　precise　model.　Based　on　these　reasons,　a　management　system　of　comprehensive　parameters　has　been　developed　for　FCC　units.　The　system　is　able　to　manage　parameters　for　all　FCC　units　during　different　periods.　It　supports　users　to　input,　edit,　search　data,　and　also　has　the　function　of　data　statistics,　data　analysis,　form　and　graph　output.　The　system　helps　users　to　make　decisions　properly.