Server starting device determining method

The invention discloses a server starting device determining method. When ports, including Sata and PCIE, of a server system are connected with multiple hardware devices at the same time, a user can select a device of a certain port in BIOS Setup to serve as a starting device, the BIOS (Basic Input Output System) shields other starting devices on the BootOption establishment stage accordingly, the user can only have access to an operation system through the guidance of the device, and other devices are used normally after login. The user can set the starting device through the BIOS, guidance through a USB flash disc and other data discs is avoided, and the security of the server system is improved; when a system disc is damaged or needs to be replaced, the original disc is replaced directly, starting sequence does not need to be adjusted, maintaining efficiency is improved, the maintainability of the server system is improved, and application value is high.