Hybrid memory device for reducing power consumption and method thereof

The hybrid memory device and method for reducing power consumption is provided. The hybrid memory device comprises a memory and a controller for performing a task that includes the NVRAM containing the backup area to back up the contents stored in the DRAM and DRAM. The control unit when it satisfies a preset condition, and backs up all the contents of the DRAM in the backup area, the address of the page table that has been mapped to a page of the DRAM, and change the page table to point to the page of the backup area, power-off the DRAM performs a go-operation-and-stop that.