To enable a user of a portable telephone having a GPS function, a portable terminal having a GPS function, or the like to reach a target property precisely, and to enable the user to obtain various kinds of information and the like on the target property.

The current position of the user is located by the portable telephone having the GPS function and the portable terminal having the same, or the like. The existence of the target property is indicated to the user by sound or voice generated by the portable telephone, a lamp, a vibration function or the like attached to the portable telephone. Various kinds of information or the like on the target property is displayed on a liquid crystal screen of the portable telephone, or the like, or is delivered by voice.