Provided is a damp control device based on large power grid wide area information. The wide area damp control device combines the core control logic function and an electric control device and is arranged at the station end, acquires wide area measurement signals, and transmits the signals to a local control system by adopting a control logic function. The device and the method adopt the modularized hardware structure, avoid the delaying effect of the scheduling far end centralized control mode by means of local control output, and improve the system operation stability.