Abstract: An approach for networked three-layer water tank control system is advanced using a predictive compensation strategy to adapt the detrimental effect of networked QoS induced by communication networks. Firstly, a dynamic on-linemeasurement method is presented for typical networked QoS performance. Secondly, a compensation strategy is designed for the given networked QoS and system performance targets. Finally, a relevant software is developed and tested through campus-wide net. The experimental results illustrate the effectiveness of the proposed scheme.