A memory system may include a memory device and a controller. The memory device may include a plurality of storage areas. The controller may be suitable for processing data associated with at least one storage area among the plurality of storage areas of the memory device, and includes a logical to physical (L2P) table suitable for storing logical to physical (L2P) data, and a journal for storing update information indicating a change of logical to physical (L2P) information stored in the L2P table. The memory device may include a logical to physical (L2P) area corresponding to the L2P table of the controller such that, in the event of a power loss, the journal is written to the L2P area of the memory device and restored to the controller when power is restored.