Provided are a navigation system, an information providing method and a mobile communication terminal wherein the merits of wide-area information delivery using broadcast waves are sufficiently utilized and further delivery data are selected or discarded at each of a plurality of terminals according to the position or traveling path thereof, whereby information in accordance with the position of each mobile communication terminal can be provided. A broadcast station of a navigation system digital-broadcasts, to a plurality of mobile communication terminals, a plurality of data files including a plurality of types of content files and at least one guide file. Each mobile communication terminal uses associated information of the guide file to determine and use a content file corresponding to the current position or to a guide path that leads to the destination.