IP network unprecedented develops in the end of the last century and it evolutes to the next generation network. The network service also presents the characteristics of diversification. Thus the traditional real-time services have not already meet people's need. Algorithms proposed in this paper are developed based on network processor IXP2400 and SDK3.1, and observed on advanced router. Measured results show that, ACL processing module realizes filter and classification functions in the QoS model and meet the requirements filter and classification in QoS system.