The invention provides a rapid load balancing system and method for coping with emergent imbalance of an electric power system, and belongs to the field of power grid balancing devices. The system comprises a power detection device and a management system. The management system is installed in a server. The power detection device sends a current signal at the end of a power transmission bus to the management system. The management system is equipped with a user applying network, and use for allowing remote signaling, telemetering and remote control information and control authority of power transmission circuit switches of users who have submits the applications to be available, so output power of charging piles in a charging station can be dynamically adjusted, vehicles with all kinds of charging power can be charged and a transformer is capable of outputting the biggest power.