The invention discloses a target-shooting system of flying saucers, a device and a method thereof. The target-shooting system of flying saucers comprises a central control unit CCU and a trap machine. The trap machine comprises a trap machine controller, a communication module and a first detection device. The first detection device is used for detecting the motion state of a throwing disk. The trap machine controller is used for acquiring a detection result of the first detection device. If the motion state of the throwing disk is determined to be abnormal by a detection result of the first detection device, the throwing disk is indicated to adjust the motion state and/or sent a notification message that the throwing disk is in the abnormal motion state to the central control unit CCU for the target-shooting system of flying saucers by means of the communication module. The target-shooting system of flying saucers, the device and the method thereof realize detection for the launching condition of flying saucers and correspondingly process when abnormity is detected.