Aiming at the problem of complex fault mechanism of military vehicles’ integrated electronic system, the paper builds an online combining active and passive testing method. For the perspective of completeness and timeliness of messages’ transmission, it proposes network’s performance testing and fault location model and develops a kind of network test equipment using online data analysis technology and real-time database management technology. By a certain type of real vehicle’s testing, it proves the feasibility and effectiveness of the testing methods and models.