System backup restoration method and device and electronic equipment

The invention discloses a system backup restoration method and device and electronic equipment, and the method comprises the steps: copying a kernel of a current Linux operating system to a corresponding root file system directory through creating a root file system directory; copying an executable file set and a shared library required by executable files to the root file system directory, and creating an initrd file; generating a minimum system according to the kernel of the current Linux operating system and the initrd file; under the minimum system, a target hard disk where the system needing to be backed up is located and a storage directory of related backup files are selected, system backup is executed, and the restoring process is inverse operation of the backup process. Compared with the prior art, the files of the generated minimum system with the backup and restoration function are all from existing files on a target machine needing to be backed up or are compiled and generated on the target machin