QoS　allows　for　the　selection　and　execution　of　Grid　workflow　to　better　fulfill　customer＇s　expections.　Introducing　of　QoS　can　provide　means　for　schedule　of　component　services　and　make　the　execution　of　workflow　satisfy　the　requirements　of　users　better.　The　estimate　algorithms　of　QoS　and　QoS-awared　workflow　schedule　are　two　basic　problems　of　workflow　QoS　management.　In　this　paper,　the　QoS　parameters　of　grid　workflow　are　discussed,　the　corresponding　QoS　estimate　algorithms　are　presented　based　on　a　Grid　workflow　model,　and　the　problem　of　QoS-awared　gird　workflow　schedule　is　proposed.　Some　QoS-awared　schedule　algorithms　are　discussed　and　a　solution　based　on　genetic　algorithms　is　proposed.