A system for distinguishing between actual power failure and false power failure in relation to a system under Efuse control includes a power unit, a detection unit, a control unit, a management substrate, and a management unit. The power unit outputs a voltage to the detection unit and the control unit. The detection unit detects state of a power supply from the power unit, and outputs a signal to the control unit. The management substrate monitors an operating state of the power unit, and outputs a status signal. The management unit obtains a system interrupt instruction from the control unit, and generates an error event or does not generate an error event according to the system interrupt instruction and a small period of time for establishing an actual or a false abnormality. A method for detecting an apparent or an actual power failure is also provided.