In one embodiment, a booting method using a system firmware with multiple embedded controller firmwares is provided to load a real embedded controller firmware into a memory of an embedded controller. In case the system firmware includes a header, an identification information of the real embedded controller firmware is included in the header and used to acquire a start code address of the real embedded controller firmware. Such booting method allows a common executable file being applied to different systems that operate embedded controllers with different embedded controller firmwares.