A method of fabricating a nanowire memory device, and a system of controlling nanowire formation used in the same method are provided. In the method of fabricating a nanowire memory device which includes a substrate; an electrode formed on the substrate and insulated from the substrate; and a nanowire having its one end connected with the electrode and formed at a given length, the method comprises: forming an electrode and a dummy electrode to be paired with the electrode on the substrate; forming the nanowire between the electrode and the dummy electrode while measuring a current flowing between the electrode and the dummy electrode, and cutting power applied between the electrode and the dummy electrode when the current measured is a given value; and removing the dummy electrode.