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.