A device and method for controlling the initiation of an image forming apparatus are provided using a NAND flash memory. The device for controlling initiation of an image forming apparatus includes: a NAND flash memory for storing a boot program and system control programs for initiating the image forming apparatus; a random-access-memory (RAM) for temporarily storing an execution program and data; and a driving unit arranged to first read the boot program and an engine control program among the system control programs from the NAND flash memory, execute the boot program and the engine control program, then read remaining system control programs from the NAND flash memory and store the remaining system control programs in the RAM when the boot program and the engine control program are being executed. Since the remaining system control programs and data that have not been read during printing preparation are read by driving a driving unit of the image forming apparatus, the preparation time for the image forming apparatus to begin printing operation can be greatly shortened.