The invention relates to a slag tank logistics unmanned control system and flow in a rotating-drum method slag treatment workshop. The unmanned control system comprises a workshop main control deviceand a plurality of slag tank conveyor vehicles, a plurality of rotating-drum devices, a plurality of cranes and slag tank tipping areas, wherein the slag tank conveyor vehicles, the rotating-drum devices, the cranes and the slag tank tipping areas are electrically connected with the workshop main control device. A slag tank receives steel slag from a steel-making device and the steel slag is transported to the slag treatment workshop by one slag tank conveyor vehicle, and the slag tank is transported to a tipping table of one rotating-drum device by one crane for steel slag treatment. If no steel slag exists in the slag tank after treatment of the tipping table, the empty slag tank is transported to one slag tank conveyor vehicle by one crane, and is transported to the steel-making deviceto receive the steel slag through the slag tank conveyor vehicle; and if the steel slag exists in the slag tank treated by the tipping table, the slag tank is transported to the slag tank tipping areas for deslagging by one crane, and after the deslagging is finished, the empty slag tank is transported to the steel-making device to receive the steel slag. According to the slag tank logistics unmanned control system and flow in the rotating-drum method slag treatment workshop, an unmanned and intelligent slag treatment workshop is created through the unmanned control of slag tank logistics.