The utility model relates to a fluid conveying system. An industrial machine comprises a frame, an arm, an accessory element, a hydraulic cylinder and a hydraulic rod, wherein the frame is used for supporting a fluid source and a suspending rod; the accessory element is linked with the arm; the arm is moveably linked with the suspending rod, so as to translate and rotate relative to the suspending rod; the hydraulic cylinder comprises a first end and a second end; an inner hole which is communicated with the fluid of the fluid source is limited by the hydraulic cylinder; the hydraulic rod is linked with the arm and is received in the hydraulic cylinder in a sliding form; the hydraulic rod comprises a port and a channel, so as to supply the fluid to the accessory element; the port is used for supplying fluid communication between the inner hole and the channel; in the whole moving range of the hydraulic rod relative to the hydraulic cylinder, the port is located in the inner hole.