1. A data processing method applied in an electronic device, comprising steps of: obtaining a first instruction for backup/recovery of designated data when a Unified Extensible Firmware Interface (UEFI) Basic Input Output System (BIOS) is started to run on a first executing core of a CPU in the electronic device; invoking a second executing core of the CPU based on the first instruction; and executing the backup/recovery of the designated data by the UEFI BIOS and the second executing core.