A method for making carbon nanotubes is disclosed. The method includes steps of: (a) providing a growing device, wherein the growing device comprises a reacting room having a gas inlet and a gas outlet; (b) forming a catalyst layer on a first planar surface of a growing substrate; (c) placing the growing substrate and a receiving substrate having a second planar surface in the reacting room, wherein the first planar surface and the second planar surface are parallel with each other; (d) introducing a carbonaceous gas in the reaction room to form a gas flow and growing a first plurality of carbon nanotubes from the growing substrate, wherein the first plurality of carbon nanotubes are brought above the receiving substrate by the gas flow; and (e) stopping the introducing the carbonaceous gas such that the first plurality of carbon nanotubes deposits on the receiving substrate.