Now　increasing　customer　Quality　of　Experience　(QoE)　has　become　a　key　factor　to　maintain　competitiveness　and　improve　business　income.　The　paper　lays　emphasize　on　addressing　the　influence　from　technology　element,　and　builds　up　a　model　of　mapping　network　key　performance　indicators　to　QoE　value　by　the　SEM　analysis　method.　A　table　is　provided　for　calculating　QoE　value,　which　can　get　the　short　board　of　network　performance　directly.　The　effectiveness　and　feasibility　of　optimizing　QoS　parameter　are　discussed　to　improve　QoE　level　of　data　service.