The invention provides a futuristic power grid model construction method and device. The method comprises the following steps of acquiring a current power grid model, an equipment power-cut plan, an equipment decommissioning plan, and an equipment addition plan; then, respectively determining an added equipment information set, a decommissioned equipment information set and a power-cut equipment information set according to the current power grid model added equipment, and according to the equipment adding plan, the equipment decommissioning plan and the equipment power-cut plan; finally, setting the state of the added equipment into a running state; forming an initial network model of various periods of time according to the timing sequence; and constructing the futuristic power grid model according to the added equipment information set, the decommissioned equipment information set, the power-cut equipment information set and the initial network model. The technical scheme provided by the invention fully considers the factors of equipment commissioning, equipment decommissioning, equipment power-cut plan, call wire equivalence and the like, thereby ensuring the completeness and accuracy of the futuristic power grid model; and a topological logic relationship is used for carrying out equipment connection, thereby ensuring the rapidity for constructing the power grid model.