A memory system includes: a memory device that includes a plurality of memory blocks each of which includes a plurality of pages that store data; and a controller suitable for performing command operations corresponding to a plurality of commands received from a host on the memory blocks, detecting performance results of the command operations performed on the memory blocks, detecting, among the memory blocks, first memory blocks where performance of the command operations failed as bad blocks, and copying and storing valid data in the first memory blocks in second memory blocks of the memory blocks.