The present invention relates to a first generation intelligent electric head ground input plate and sensitive component monitoring system and method. The system comprises a front end machine, an acquisition control device, a first generation intelligent electric head ground input plate acquisition adapted device, and a switch power supply. The acquisition control device comprises a master control board, a switch value output plate, an analog input plate, and a switch amount input plate. The first generation intelligent electric head ground input plate acquisition adapted device comprises a first generation intelligent electric head ground input plate adaption device and a first generation intelligent electric head ground input plate test control board. The testing system provided by the invention has a high degree of intelligence, the workload of a tester is reduced, the utilization rate of the testing system is improved, the provided testing method has safe operability, in the condition of lowest risk, a long term machine testing test or working condition simulation test is used to distinguish the operation state of the first generation intelligent electric head ground input plate and the full whole automatic online monitoring of a sensitive component.