The present invention discloses a fee control card and table interaction fault diagnostic system, belonging to the technical field of power utilization application. The system comprises: a sensing device configured to collect interaction radio-frequency signals; a signal processing device configured to convert the interaction radio-frequency signals to real-time radio-frequency digital signals; afault data bank configured to store matching features of various normal or abnormal radio-frequency digital signals and a fault diagnostic policy; and a central processing device configured to extractthe real-time matching features of the real-time radio-frequency digital signals, performing matching of the real-time matching features and the matching features of the fault data bank and perform feedback of the fault diagnostic policy corresponding to the radio-frequency digital signals in the fault data bank matching with the real-time matching features to users. The fee control card and table interaction fault diagnostic system can perform fault reason diagnosis from the data layer of the fee control card and table interaction signals and can facilitate reduction of technical requirements of maintainers with no need for high specialized knowledge.