Method and System of Power Control

A power control method for a computer system is disclosed. The computer system establishes wireless connection with a handheld equipment via a wireless communication interface. The power control method includes receiving a sound signal transmitted from the handheld equipment via the wireless communication interface when the computer system operates in a shut-down state, recognizing the sound signal to generate a recognition result, and starting the computer system when the recognition result indicates that the sound signal conforms to a start command.