The invention discloses a fault detection method and apparatus, and a storage medium. The method comprises the steps of obtaining a target system file set in a mobile terminal with a fault, wherein the target system file set comprises at least one target system file; detecting whether the target system file comprises a specific identifier or not; if the target system file comprises the specific identifier, judging whether the specific identifier is matched with a preset verification identifier or not; and if the specific identifier is not matched with the preset verification identifier, feeding back information that the target system file corresponding to the specific identifier is modified. The specific identifier is added to the target system file; when the mobile terminal with the faultis detected, whether the target system file is modified or not can be quickly determined by comparing the specific identifier with the preset verification identifier; and whether the mobile terminalwith the fault is an official system or not is further determined, so that the fault detection efficiency is improved.