a cellular phone , including a gps signal processing means and a camera , performs navigation by use of a display device , the navigation performed through location information detection means for detecting location information from a picture taken by the camera , and gps signal processing means based on location information detected by the location information detection means . by determining destination information using gps on the basis of information taken by the camera , or by acquiring destination information and additional information from a server , setting of destination for subsequent navigation is simplified .