A tire management system assigns work to each of a plurality of vehicles and manages a loaded state of a tire mounted on each of the vehicles that perform the assigned work. The tire management system includes: an overload vehicle detection unit configured to detect an overloaded vehicle in which a tire load of the work assigned to each of the vehicles exceeds a predetermined tire load set in the tire itself of the vehicle; and a work contents changing processing unit configured to perform, when the overloaded vehicle is detected, processing of changing work contents of the overloaded vehicle such that the tire load of the overloaded vehicle becomes equal to or less than the predetermined tire load.