A door control system and method for a vehicle door includes a power assist mechanism. The system starts a power assistance for opening of the vehicle door from a fully closed position when the vehicle door is moved by an operation of a door handle under a condition that a door lock being disengaged in association with the operation of the door handle. The power assistance force is supplied to the vehicle door by actuating the power assist mechanism when the vehicle door is judged to be not moving even after a preset time period lapsed from a counting of a time started from the operation of the door handle.