Abstract: A method of growing 2-D crystals includes: providing a plurality of sub-substrates; stacking the plurality of sub-substrates to form a stacked substrate; disposing the stacked substrate into a crystal-growing furnace; pumping a reaction gas into the crystal-growing furnace; and heating the crystal-growing furnace to enable the reaction gas to react on the stacked substrate, and at least one 2-D crystal is formed on at least one surface of the plurality of sub-substrates in the stacked substrate.