Grid　workflow　can　be　executed　based　on　the　parameters　of　some　newly　introduced　non-functional　properties　such　as　QoS　to　satisfy　the　customer　expectations　better.　Here　we　propose　a　QoS-aware　grid　workflow　engine　called　QGWEngine.　First,　the　supported　QoS　parameters　and　the　grid　workflow　model　are　introduced.　Then　the　architecture　of　QGWEngine　is　explained.　Finally,　the　validity　of　QWGEngine　is　illustrated　through　a　hypothetical　grid　workflow　example.