For solving the problem of stability of wireless sensor network(WSN) systems under greater external disturbance in industrial environment,this paper proposes a method that combines the Hamilton-Jacobi-Bellman(HJB) equation with the Minimax control method. Firstly, for solving the problem of that WSN has boundary of the delay and continuous packet loss in complex working conditions, the model of wireless sensor network systems with time delay and packet loss is given. Then, under the performance index function of Minimax, the Minimax optimal controller of the system is designed by using the HJB equation. Furthermore, a checking function is constructed to estimate the maximum disturbance that the system can withstand, and a sufficient condition for the stability of the system is proposed. Finally, the feasibility and effectiveness of the method are verified by numerical examples and simulation when the system is subject to sudden greater external disturbance.