1. A nonvolatile memory device comprising: a memory cell array comprising a first area that stores memory management information and a second area that stores user data; a decoder configured to select at least one of rows of the first area or the second area based on an address; a page buffer configured to store data in memory cells connected to the selected at least one row or to detect data stored in the memory cells; and control logic configured to control the decoder and the page buffer in response to a specific command, to access the first area, wherein the memory management information is iteratively programmed by a specific memory unit and is written at different columns of specific memory units.