Abstract: The present disclosure provides an electromagnetic environment evaluation system for a civil airport and an aviation station. An integrated transport hub, air-rail intermodality, and rail transit cause relatively strong electromagnetic interference to a navigation station. A high voltage transmission line and a communications base station also cause relatively strong electromagnetic interference to the navigation station. A large charging pile and other industrial, scientific, and medical (ISM) devices next to the airport cause electromagnetic interference to a navigation device in the airport. In the present disclosure, such interference is detected. If an interference determining apparatus determines that there is an anomaly after performing first interference determining, the interference determining apparatus performs second interference determining to avoid that subsequent actions are incorrect due to accidental data errors of the interference determining apparatus, and further reduce an error rate.