Now a number of advanced control systems take advantage of networks such as Ethernet, Fieldbus and Internet as their communication channel. Transmission time delay of these networks may lead unstable problems to system. In this paper, the prediction of network delay using neural network is presented first. Then the analysis of the control oriented quality of service (CO-QoS) specially with the Internet-based teleoperation is considered and fuzzy inference is used to construct a quantification of CO-QoS. At last, the simulation results show that this method provides a practical way for the judgment of the network's characteristics.