A method for data migration includes: receiving by a SMF current location information of a terminal; the SMF is at a core data management center, a first service and a service message are added in the SMF; determining whether it is necessary to switch a path of a business service currently in use for the terminal on the basis of the current location information and original location information of the terminal; and when the determination result is yes, migrating path information of the business service from an original business application to a target business application, the original business application corresponds to the original location information, the target business application corresponds to the current location information; the original business application and the target business application are for providing the business service to the terminal, and have subscribed to the first service.