System and method thereof for detecting physical on/off state of power protection circuit

The invention relates to a system and a method thereof for detecting the physical on/off state of a power protection circuit. The detection system comprises state detection devices, an information acquisition device and a master station server, wherein the state detection devices are arranged below pressing plates in a non-contact way, and are sequentially connected with the information acquisition device and the master station server. The method comprises the following steps that: (1) the state detection devices and the information acquisition device are initialized and checked per se; (2) the state detection devices detect the states of the pressing plates, and transmit own identifiers (ID) and the states of the pressing plates by the information acquisition device; and (3) the master station server processes the IDs of the state detection devices and the states of the pressing plates. The system and the method are rationally designed; and under the condition of not influencing the working states of the pressing plates, the states of the pressing plates are automatically detected, collected and transmitted to the master station server for state detection by a non-contact detection method without influencing the conventional protection circuit, so the safe and reliable running of a power grid system is ensured.