ETL　tool　do　extraction,　transformation　and　loading　job　in　the　process　of　building　a　data　warehouse.　Commercial　ETL　tool　must　run　at　high-powered　server　such　as　minicomputers　to　do　large　number　of　computation.　It　greatly　increased　the　cost　in　purchasing　hardware.　According　to　the　problem　about　computation　efficiency,　a　cooperative　computation　model　among　multi-servers　was　put　forward.　A　coordinator　was　created　to　control　multi-server＇s　cooperative　process　for　reinforcing　server＇s　computation　ability.　Compared　to　the　former　ETL　tools,　it　reduces　the　requirements　for　the　server＇s　performance　in　a　certain　extent.