Data migration method for memory modules in server and server

The embodiment of the invention discloses a data migration method for memory modules in a server and the server. A mirror relationship is built between agent devices of two memory modules through a processor, and the agent devices are instructed to perform data migration between the two memory modules, so that data migration from one memory module to the other memory module is realized without participation of an operating system, the time consumption of data migration is low, and data migration of the memory modules in the server is realized conveniently.