1. A method of providing guidance information, the method being implemented by a computer, the method comprising: confirming a result of recognizing a crosswalk around a vehicle; comparing the crosswalk recognition result with map data on a global positioning system (GPS) reception position of the vehicle; amending a map matching position of the GPS reception position based on the comparison result; and providing a position information of the vehicle as guidance information based on the amended map matching position, wherein comparing of the crosswalk recognition result with the map data comprises confirming whether a real crosswalk exists within a threshold range, based on the map data on the GPS reception position, and wherein amending the map matching position comprises amending the map matching position when the crosswalk recognition result does not correspond to whether the real crosswalk exists.