This paper presents the design of an AIS Base Station Credibility Monitoring System, based on the practical application needs in safe vessel navigation. Initially, an in-depth analysis of navigation safety requirements was conducted for real-time vessel operations, establishing the system on a three-layer data architecture C/S model. The system’s functional design is segmented into the representation layer, business logic layer, and data access layer. Subsequently, to implement the system’s core functionality-AIS Base Station Credibility Monitoring—a modular approach was adopted. This involved the focused design of the message preprocessing module, communication module, credibility monitoring module, and human–computer interaction operation module. Finally, the system’s effectiveness was tested by simulating various interference scenarios, demonstrating that the monitoring system can effectively oversee the credibility of AIS base stations, as confirmed by the test results.