1. A method of driving a flash memory device, comprising: applying power to the flash memory device, including a memory cell array for storing set information regarding operation environment settings; performing an initial read operation on the memory cell array; and judging a status of data, corresponding to the set information, read during the initial read operation to determine whether the initial read operation has passed or failed, wherein the set information comprises at least one bit, each bit of the set information being extended to n bits (where n is an integer equal to or greater than 2), and the n bits are respectively stored in different input/output regions in the memory cell array.