A method for loading configuration data onto a non-volatile memory and the device using the same is provided. A non-volatile memory block is preloaded with a certain compatible memory configuration data in advance when the memory device is being manufactured. The memory configuration data comprises plural parameters corresponding to the non-volatile memory. When readying the memory device, the preloaded configuration data is loaded onto a random-access memory thereof so as to save the space in a read-only memory used for storing the memory's identification and its specification. Additionally, means for loading the configuration data from the preload zone onto the random-access memory is introduced to update the firmware.