The invention discloses a multi-target parking space reserving optimal selection method.The method comprises the steps that indexes such as the shortest whole course time, the shortest walking distance and the minimum parking fee are selected according to indexes such as the starting point, the destination, the predicted destination reaching moment and the predicted vehicle staying time, and a system performs data calculating processing according to parameters such as the remaining parking space of parking lots around the destination at the predicted moment, the parking fee of the parking lots, the road condition of routes from the parking lots to the starting point and the walking distance from the parking lots to the destination to calculate the most suitable parking lot for a driver and supply a parking space reserving service.According to the method, data such as the parking space reserving information, the recommended departure time, the recommended driving route and the predicted parking fee is finally supplied to the driver and loaded to a vehicle-mounted navigator simultaneously, and therefore the purpose of supplying the services such as integrated navigation including dynamic driving route inducing, parking space reserving and walking guiding is achieved.