PURPOSE: To provide a method for leading out electric energy and the manufacture of hydrogen by using its electric energy, which can be semipermanently utilized and at the same time does not destroy the balance of the ecosystem due to environmental pollution and the like.

CONSTITUTION: An excimer laser beam 5 which satisfies the conditions of the photoionization in the air 4 is emitted toward an ionization layer 3 from the earth 1, thereby changing the air 4 between the earth and the ionization layer into a conductor, and the earth and the ionization layer are interconnected, so that the downward electric field of the air allows a current to flow through the conductor downward, and the current is taken in from a transparent electrode plate 8, and the current is taken out from a lead wire 7 connected to the transparent electrode plate 8 or water is electrolyzed by the taken-out current, thereby manufacturing hydrogen from water.