The invention discloses an electric power system safety and stability emergency control method based on a two-stage remedial strategy, and belongs to the field of electric power system safety and stability control. A safety and stability sensitivity comprehensive factor and a control cost calculation formula of a control measure are added into the control strategy table designing to meet the requirement for safety and stability optimizing control. Under the condition that a control order is not actually executed, a control station selects an optimizing control measure from the control measure space of the control station in an iteration mode to carry out the remedy control in a precedence mode, and a last-level collaborative defense control station of the control station selects the optimizing control measure in the control measure space of the collaborative defense control station to carry out the remedy control; under the condition that the control station does not have the control measure, the last-level collaborative defense control station selects the optimizing control measure to implement the remedy control, and therefore the two-stage remedy control according to the non-implementation of the control order and the insufficient single-control station control measure is achieved. The reliability of the safety and stability emergency control can be effectively enhanced.