A software version rollback method, apparatus, and system are provided, which can be applied to the field of intelligent vehicle. The method includes: obtaining a differential update package of target software; updating a current version of the target software by using the differential update package, where the current version of the target software is updated from a first version to a second version; and when there is a rollback requirement, performing rollback on the target software by using the differential update package, to roll back the current version of the target software to the first version. When software version rollback is performed on the target software, a complete installation file of target software of an old version does not need to be re-downloaded from an update server, and the backed up old version, which timely software rollback can be implemented while occupancy of storage space of a vehicle is reduced.