Systems and methods are provided for repairing system files. For example, a list of system files including file information of one or more first repairable system files are updated in real time; file information of a target file sent from a terminal is received; whether the target file is in need of repair is detected based on at least information associated with the list of system files; in response to the target file being in need of repair, a first repair strategy for the target file is determined based on at least information associated with a predetermined database of repair strategies and a file type of the target file; and the target file is repaired based on at least information associated with the first repair strategy.