A navigation system for an electric vehicle, said navigation system comprising a display terminal that sends and receives information to and from an electric vehicle over a network; and a server that sends and receives information to and from said display terminal over the network, wherein said display terminal performs processing for sending a search request for a route, via which said electric vehicle moves from a starting point to a destination, to the server, the search request including position coordinates of the starting point, position coordinates of the destination, a remaining battery capacity, a battery capacity, and a start time; processing for displaying route guidance information on an output device, the route guidance information sent from said server, the route guidance information created based on a route search result that includes one or more pieces of base point information; wherein said server performs: processing for searching for a route, via which said electric vehicle moves from the starting point to the destination without battery exhaustion, in response to the route search request from said display terminal; and processing for sending the route search result, which includes the derived base point information, to the display terminal; characterized in that the display terminal further performs processing for displaying, on said output device, a confirmation point, an estimated remaining battery capacity, which is included in one of the pieces of the base point information, and a result of comparison of the estimated remaining battery capacity with a remaining battery capacity when said electric vehicle has passed the confirmation point, and said server further performs processing for deriving position information of one or more confirmation points on the searched-for route depending on a time, a distance, a power consumption, or a position information of a crossing; processing for calculating a boundary value of the remaining battery capacity or a value indicating a band including a maximum value and a minimum value of the remaining battery capacity, which is assumed when the electric vehicle has passed the confirmation point, as the estimated remaining battery capacity at each position information, adding the position information of the confirmation points and the calculated estimated remaining battery capacity to the route search result as the one or more pieces of the base point information; and said display terminal further performs processing for requesting said server to perform a route re-search according to whether the remaining battery capacity when the electric vehicle has passed the confirmation point becomes smaller than the boundary value of the estimated remaining battery capacity or becomes larger than the band or smaller than the band. processing for searching for a route, via which said electric vehicle moves from the starting point to the destination without battery exhaustion, in response to the route search request from said display terminal; and processing for sending the route search result, which includes the derived base point information, to the display terminal; characterized in that the display terminal further performs