A time correction method, apparatus, and system, and relate to the field of communications technologies are provided. A virtual network function manager (VNFM) receives a hot migration notification message from a virtualized infrastructure manager (VIM) after hot migration is performed on a first virtual machine, where the hot migration notification message includes an identity (ID) of the first virtual machine; the VNFM searches, according to the ID of the first virtual machine, for a correspondence that is between an ID of a virtual machine and an identity of a service control virtual network function (VNF) and stored in the VNFM, to determine a first service control VNF; and the VNFM sends the hot migration notification message to the first service control VNF, where the hot migration notification message is used to instruct the first service control VNF to correct a system time of the first virtual machine.