Provided are a navigation service assistance system based on a driver line of sight and a vehicle navigation system using the same. The navigation service assistance system recognizes in real time a direction at which a driver looks and a line of sight of the driver, using a sensor. The navigation service assistance system matches external image data and coordinates information based on the line of sight of the driver, using a map controller and extracts detailed information about a text, a place, a road, or the like at a matched position. Here, the map controller assists in enabling automatically extracted text information or a building, a place, a road, or the like to be set or changed as an intermediate point or a destination with only a simple operation of the driver.