A memory area managing method of a multi-port memory device in a memory link architecture which includes a multi-port memory device, a memory controller, and a flash memory, the method including performing a data processing step in which data stored in a host CPU area of the multi-port memory device is processed by a host CPU connected with the multi-port memory device, the processed data being stored in a shared area; performing a file data generating step in which file data on the processed data stored in the shared area is generated according to a write command of the host CPU, the file data being stored in a memory controller area of the multi-port memory device; and performing a file data storing step in which the file data is read out from the memory controller area and the read file data is sent to the flash memory.