Networked Control Systerm is a distributed control system based on Network with high real-time performance. When a CPU connects with more than one node in NCS, the network scheduling is investigated. A new switched approach of GA algorithm with Communication Schedule is designed to integrate the performance scheduling and H infinity Control. And Simulation results prove that the proposed method can improve the H infinity performance of NCS and corresponding control alrigothms are found, which reveals the effectiveness of GA method.