Abstract: Disclosed are a method and an electronic device for upgrading or downgrading a system. The method mainly includes: acquiring a system data packet; backing up user data when a data type of the system data packet is determined to be a whole packet type and this system operation is determined to be a system downgrading, wherein the whole packet type indicates that the system data packet is a complete data packet that can be independently used for upgrading or downgrading; and executing the system data packet to implement a system downgrading after the user data are backed up.