A remote control method through wireless transmission is provided. The method includes the following steps: (A) a portable computer determines whether a wireless signal outputted from a mobile apparatus having a wireless transmission module is received; (B) if the portable computer receives the wireless signal, the portable computer searches whether a wireless control command corresponding to the wireless signal is in a multimedia command table; (C) the portable computer executes a multimedia command corresponding to the wireless control command to control audio/video playing in the portable computer when the wireless control command is found in the multimedia command table.