A public transportation control system controls a suitable distance between public buses traveling on a road with traveling data of the buses through collection of the traveling data of the buses and transmission of transportation information of a target bus based on the traveling data to the target bus, and transmits the transportation information of the bus to respective bus stops on the basis of the collected traveling data of the bus in order to provide guidance of arrival schedule of the bus at the bus stops to passengers waiting for the bus, thereby preventing clumping of the buses and allowing the passengers to efficiently use a bus wait time through guidance of accurate transportation information.