A structure body cutting system (1) includes a cutter system (2) mounted on a cutting side trailer (20) and configured to cut a blade (8) to be cut, and a feeder system (5) mounted on a feeding side trailer (50) and configured to send out the blade (8) to the cutter system (2). The blade (8) is placed so as to straddle between the cutter system (2) and the feeder system (5). The feeder system (5) sends out the blade (8) to the cutter system (2) as the feeding side trailer (50) comes close to the cutting side trailer (20). The cutter system (2) cuts the blade (8) into a plurality of cut segments by cutting the blade (8) sent out from the feeder system (5) .