Abstract: A booting method for an electronic device having a display device is provided. The method includes steps of receiving a booting signal and, according to the booting signal, a booting procedure is performed. The booting procedure comprises activating a basic input/output system to read a graphic device variable. According to the graphic device variable, a system configuration of the electronic device is set so that the booting procedure is performed with a first graphic device corresponding to the graphic device variable. When the display device displays a booting frame, an operating system is activated. When there is no frame shown on the display device and a hot-key signal is received, the graphic device variable is rewritten according to the hot-key signal so that the graphic device variable corresponds to a second graphic device. A rebooting procedure is performed on the electronic device.