A flexible manufacturing system comprising: a machining device that has a machining position where a pallet to which a workpiece is attached is disposed, and machines the workpiece that has not been machined and that is attached to the pallet disposed at the machining position to form a machined product; a pallet storage room that is able to store a plurality of the pallets; a loading station (41, 42) through which the pallet to which the new workpiece is attached is loaded into the flexible manufacturing system; a pallet changer that is provided integrally with or adjacent to the machining device, has a standby position where the pallet to be moved to the machining position of the machining device stands by, and exchanges the pallet at the machining position for the pallet at the standby position; a conveyor that is able to convey the pallet between the pallet storage room, the loading station (41, 42), and the standby position of the pallet changer; a first controller that controls the machining device and the pallet changer; and a second controller that controls the conveyor, wherein a plurality of the machining devices (10, 11), and a plurality of the pallet changers (20, 21) that correspond to the plurality of the machining devices (10, 11) are provided, characterized in that the second controller controls the conveyor such that, when the pallet to which a workpiece that is a super-urgent item is attached is loaded on the loading station (41, 42), the second controller controls the conveyor to convey the pallet at the standby position to the pallet storage room and then convey the pallet loaded on the loading station (41, 42) to the standby position, and when the pallet to which the workpiece that is the super-urgent item is attached is loaded on the loading station (41, 42), the second controller i) determines a machining device with a shortest remaining machining time on the workpiece that is presently being machined, among the plurality of the machining devices (10, 11), ii) controls the conveyor to convey the pallet at the standby position of the pallet changer corresponding to the machining device with the shortest remaining machining time to the pallet storage room, and iii) then controls the conveyor to convey the pallet loaded on the loading station (41, 42) to the standby position of the pallet changer corresponding to the machining device with the shortest remaining machining time. a machining device that has a machining position where a pallet to which a workpiece is attached is disposed, and machines the workpiece that has not been machined and that is attached to the pallet disposed at the machining position to form a machined product; a pallet storage room that is able to store a plurality of the pallets; a loading station (41, 42) through which the pallet to which the new workpiece is attached is loaded into the flexible manufacturing system; a pallet changer that is provided integrally with or adjacent to the machining device, has a standby position where the pallet to be moved to the machining position of the machining device stands by, and exchanges the pallet at the machining position for the pallet at the standby position; a conveyor that is able to convey the pallet between the pallet storage room, the loading station (41, 42), and the standby position of the pallet changer; a first controller that controls the machining device and the pallet changer; and a second controller that controls the conveyor, wherein a plurality of the machining devices (10, 11), and a plurality of the pallet changers (20, 21) that correspond to the plurality of the machining devices (10, 11) are provided, characterized in that the second controller controls the conveyor such that, when the pallet to which a workpiece that is a super-urgent item is attached is loaded on the loading station (41, 42), the second controller controls the conveyor to convey the pallet at the standby position to the pallet storage room and then convey the pallet loaded on the loading station (41, 42) to the standby position, and when the pallet to which the workpiece that is the super-urgent item is attached is loaded on the loading station (41, 42), the second controller i) determines a machining device with a shortest remaining machining time on the workpiece that is presently being machined, among the plurality of the machining devices (10, 11), ii) controls the conveyor to convey the pallet at the standby position of the pallet changer corresponding to the machining device with the shortest remaining machining time to the pallet storage room, and iii) then controls the conveyor to convey the pallet loaded on the loading station (41, 42) to the standby position of the pallet changer corresponding to the machining device with the shortest remaining machining time.