A multi-chip system and a boot code fetch method include a nonvolatile memory chip storing a volatile memory chip, and a boot code, and a host fetching the boot code. The boot code is transferred to the volatile memory chip before the host fetches the boot code in the nonvolatile memory chip, and the boot code is fetched in the volatile memory chip. Therefore, a bootRAM of the conventional nonvolatile memory chip may be removed, so that an area of the nonvolatile memory chip can be reduced.