NOVELTY - A microorganism electrolytic cell comprises The catalyst electrode or amination carbon electrode which introduces nitrogen-containing functional groups, such as an amino group, into the surface by carrying out the electrolytic oxidation of the carbon to an anode in an ammonium-carbamate solution, and electrolysis modification carbon electrode produced by carrying out the prolonged electrolytic reduction of the amination carbon electrode in a sulfuric acid solution is used as a hydrogen generation catalyst electrode.    USE - Microorganisms electrolytic cell is used for circulating-type hydrogen production facility for circulating-type natural energy electric generating facility (all claimed).    ADVANTAGE - The microorganism electrolytic cell enables efficient and economical bio-hydrogen production with excellent energy conversion efficiency, high yield and hydrogen generation speed.    DETAILED DESCRIPTION - A microorganism electrolytic cell comprises The catalyst electrode or amination carbon electrode which introduces nitrogen-containing functional groups, such as an amino group, into the surface by carrying out the electrolytic oxidation of the carbon to an anode in an ammonium-carbamate solution, and electrolysis modification carbon electrode produced by carrying out the prolonged electrolytic reduction of the amination carbon electrode in a sulfuric acid solution is used as a hydrogen generation catalyst electrode. The electrolytic cell has function structure which makes organic substance, such as glucose in which microorganism metabolism is possible, and an acetic acid, and fixed microbial electrode which fixes the microorganisms used as anode, and the anode produces hydrogen with electron donor. INDEPENDENT CLAIMS are included for the following:    (1) circulating-type hydrogen production facility; and    (2) circulating-type natural energy electric generating facility.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram explaining circulating-type bio-hydrogen production facility. (Drawing includes non-English language text)