A memory system includes: a memory device including a plurality of memory blocks each having a plurality of pages suitable for storing data; and a controller suitable for: receiving a plurality of commands from a host; controlling the memory device to perform a plurality of command operations in response to the plurality of commands; identifying parameters for the memory blocks affected by the command operations performed to the memory blocks; selecting first memory blocks among the memory blocks according to the parameters; and controlling the memory device to swap data stored in the first memory blocks to second memory blocks among the memory blocks.