Power-on signal transmitting system and power-on signal transmitting method

A power-on signal transmitting system, comprising:

• a first electronic device comprising a first power-on control unit and a first power-on detection unit;
• a second electronic device comprising a second power-on control unit and a second power-on detection unit;
• and
• a cable comprising:
• at least one information wiring coupled between the first electronic device and the second electronic device, the at least one information wiring being used for transmitting an information signal between the first electronic device and the second electronic device;
• and
• a signal level wiring, the signal level wiring being coupled to the first power-on control unit, the first power-on detection unit, the second power-on control unit and the second power-on detection unit respectively, the signal level wiring being used for providing a first reference level when the first electronic device and the second electronic device are both at a power-on state;
• wherein when the second electronic device is at a power-off state, the first power-on control unit of the first electronic device being used for sending a first power-on signal to the second power-on detection unit of the second electronic device through the signal level wiring, so as to turn on the second electronic device, on the other hand when the first electronic device is at the power-off state, the second power-on control unit of the second electronic device being used for sending a second power-on signal to the first power-on detection unit of the first electronic device through the signal level wiring, so as to turn on the first electronic device.