Memory device and memory system including same

The memory device is a nonvolatile memory circuit which stores the hard repair data; Boot-up operation when the data bus for transferring the hard repair data, and passes the soft repair data when the soft repair operation; A plurality of registers that stores the repair data transmitted through the data bus, and when storing the transmission of repair data enable; A control circuit for, but a number of the registers select the register to store the transmission of repair data, disable the soft repair operation when the register that stores the same data as that in the transmission of repair data; And it may include a memory bank to perform a repair operation using the data stored in the enable register of the plurality of registers.