The invention discloses an RFS-based fast F-IO read-write system and method. The RFS-based fast F-IO read-write system and method comprises a virtual memory management module, a virtual memory file module and a file IO module. Meanwhile, the invention discloses a method of the system. According to the system and method provided by the invention, a virtual memory file system can be conveniently created, the reading and writing of the files can be efficiently realized, and efficient technical solutions can be provided for the application systems with a large number of file IO operation demands, so that the running performance and concurrent performance of the application systems are improved.