A belt-conveying aerial system comprising: a pair of top fixed load-bearing ropes, which are parallel to one another and are set at a distance apart from one another in a transverse direction; a pair of bottom fixed load-bearing ropes; and a belt conveyor comprising a plurality of modules, which are aligned along the load-bearing ropes, are fixedly connected to the load-bearing ropes, and guide a belt for conveying materials; the modules being connected to the load-bearing ropes via an installation vehicle having a supporting top carriage mobile on the top load-bearing ropes, a pair of resting platforms suspended from the top carriage, and, for each bottom load-bearing rope, at least one pair of wheels, which are rotatable in contact with the respective bottom load-bearing rope and are set upstream and downstream of the corresponding module.