1. A memory chip, coupled to a host, comprising: a memory, pre-loading a plurality of boot images, wherein the boot images have the same content; and a controller, coupled to the memory, processing data transmissions between the memory chip and the host, wherein the controller further determines whether the memory chip enters a boot mode for the first time, and when the memory chip enters the boot mode for the first time, the controller accesses the memory to obtain a correct boot image from the boot images and transmits the correct boot image to the host, wherein each boot image comprises a plurality of data blocks, the controller loads a plurality of correct data blocks from one or more of the boot images to obtain the correct boot image.