Abstract: As modern radar develops toward multi-functional integration and distributed collaboration, heterogeneous networks that are gradually expanding in scale have been widely used in military radar equipment. Multi-protocol heterogeneous networks realize high-speed data exchange, signal processing, system control and other functions. Monitoring network status and maintaining network health are crucial to ensuring efficient and reliable operation of radar systems. This paper introduces FC, RapidIO, Ethernet used in radar systems, and analyzes the characteristics and common test methods of each protocol. By carrying out test method optimization, test result analysis, and user interface design, a heterogeneous network testing and management system was implemented, including network monitoring, fault location, health warning and so on, which improved the comprehensiveness and efficiency of radar system testing. It plays an important role in ensuring the stable operation of heterogeneous networks.