To improve the reliability of tracking system in data transmission,a multichannel strategy is adopted instead of single channel transmission to reduce the possibility of packet dropout.The system output is measured and tracked,and the tracking error and output error are analyzed to find the conditions for stability.A discrete random sequence satisfying the Markov distribution is used to describe the channel choice states,and the Markov state transition matrix is used to represent the transition probability between different states,so as to carry out stability analysis.By constructing Lyapunov function and utilizing linear matrix inequality,the sufficient conditions for stability and strict (Q,S,R)-γ-dissipativeness are obtained for the multi-channel transmission system,thus a mode-dependent controller is designed to achieve desired system tracking.Finally,a simulation example is provided to verify the effectiveness of the proposed multichannel transmission strategy.