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Satisfaction of customers has become essential in the telecom service commitment, the user-perceived quality-of-service (QoS) has been proposed. According to our knowledge, the existing network assessment models have not been associated with the user behavior. Network capacity, packet loss rate and transmission delay are believed to be the key factors in the assessment of network QoS. To fill the gap in the current research and practice, this paper proposes a new network evaluation method based on a set of so-called customer satisfaction indices (CSI). Not only the technical factors but also the user behavior is incorporated in the new evaluation model, which is more comprehensive and reasonable to evaluate the net work QoS for Telecom operators.