A routing guide system has memory means provided outside a mobile body for storing data of images at a plurality of guide points. The routing guide system also has distance measuring means for measuring the distance from the current position of the mobile body to the next guide point. The routing guide system also has image request generation means for generating an image request for the next guide point when the distance measured by the distance measuring means is not more than a first predetermined distance. The routing guide system also has transmission means provided outside the mobile body for reading from the memory means an image of the next guide point in response to the image request and for transmitting that image to the mobile body. The routing guide system also has display control means for causing the mobile body to receive the image transmitted from the transmission means and causing a display device to display the image.