The invention relates to an electrically driven underwater emergent safety control system. The system is characterized by comprising a triggering device, an electrically controlled device, a power device, a plurality of blowout preventer executing devices, a plurality of electric pump devices and a liquid-storing device, wherein the electrically controlled device, the power device and the electric pump devices are arranged in a sealed shell fully filled with insulating liquid; the blowout preventer executing devices and the liquid-storing device are arranged out of the sealed shell. The system is compacter in structure, purchasing cost is saved, and space occupation rate is reduced. The system is positioned at the place nearby a well mouth on sea bottom, so that when an accident such as blowout is caused and a marine drilling platform well control system cannot timely and reliably seal a well, the safety of equipment and people is guaranteed, the environment is protected, and loss is reduced to the largest degree. The system can be widely applied to fields, such as marine scientific investigation.