A semiconductor memory device includes a memory cell array, a storage circuit suitable for storing pattern data, a data input circuit suitable for receiving normal write data from an external device, a comparison circuit suitable for comparing the pattern data with the normal write data based on a pre-read control signal, and generating a comparison signal corresponding to the comparison result, and a write circuit suitable for writing the pattern data to the memory cell array based on a pre-write control signal, and writing some of the normal write data to the memory cell array based on a normal write control signal and the comparison signal.