The invention discloses an electromobile and power grid interactive simulation load system. The electromobile and power grid interactive simulation load system comprises a battery system, a bidirectional AC/DC module, a grid-connected control protection module and a monitoring terminal, wherein the battery system comprises a battery and a battery management system, the battery management system is connected with the battery, the monitoring terminal is connected with the battery management system, the bidirectional AC/DC module and the grid-connected control protection module separately, the battery management system is also connected with the bidirectional AC/DC module, the bidirectional AC/DC module is connected with a power grid through a circuit breaker and is further connected with the grid-connected control protection module, and the grid-connected control protection module is connected with the power grid through the circuit breaker. The invention also discloses an electrical protection method of the system. By the system, the electrical safety problem of a device during the simulation load working process and the grid-connected safety problem when an electromobile is connected to a power grid are solved, and the safety of the device is improved.