Disclosed are herein an apparatus of guiding safe driving at intersections and a method of guiding safe driving using the same. The driving guiding apparatus at intersections includes an intersection condition sensing unit installed at one side of a vehicle and sensing the current conditions around an intersection, an intersection pre-entry condition calculation unit installed at the other side of the vehicle and calculating in advance current condition data before the vehicle enters the intersection based on current condition data corresponding to the current conditions around the intersection sensed by the intersection condition sensing unit, and an intersection pre-entry vehicle speed indication unit installed at the other side of the vehicle and indicating a reference vehicle speed, corresponding to the current condition data calculated by the intersection pre-entry condition calculation unit, before the vehicle enters the intersection.