TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The ratio of catalyst metal with respect to total weight of composite catalyst is 0.01-50 wt.%. The transition metal compound is chosen from metal phosphate, metal sulfate, metal nitrate, metal organic acid salt, metal acid halide, metal alkoxide, metal halide, metal hypohalite, metal hypohalous acid salt, and metal complex. Ratio of heat-treated object, carbon, nitrogen and oxygen is 1:x:y:z. Ratio of number of atoms of transition metal element, 2nd transition metal element, carbon, nitrogen and oxygen is (1-a):a:x:y:z.a=0-0.5;x=0-7;y=0-2; andz=0-3.Preferred Process: Acquiring the composite catalyst containing heat-treated object and catalyst metal is performed by dispersing heat-treated object in catalyst metal precursor solution, evaporating to dryness, heat-processing after, making heat-treated object carry catalyst metal by dispersing heat-treated object in catalyst metal precursor colloidal solution, and making catalyst metal precursor colloid adsorb to the heat-treated object, and making catalyst-precursor colloid adsorb at the same time by adjusting pH of mixed solution of solution and catalyst precursor colloidal solution which contain metallic compound used as raw material of heat-treated object precursor. Precipitation inhibitor consisting of the compound which has a diketone structure is further mixed. The solution and precipitation inhibitor of transition metal compound are mixed, and the nitrogen-containing organic compound is then mixed.    TECHNOLOGY FOCUS - METALLURGY - Preferred Components: The catalyst metal is chosen from platinum, gold, silver, copper, palladium, rhodium, ruthenium, iridium, osmium, rhenium and their alloys. The transition metal element (M1) is chosen from titanium, zirconium, niobium and tantalum. The 2nd transition metal element (M2) is chosen from iron, nickel, chromium, cobalt, vanadium and manganese.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The nitrogen-containing organic compound is chosen from amino group, nitrile group, imide group, imine group, nitro group, amide group, azido group, aziridine group, azo, isocyanate group, isothiocyanate group, oxime group, diazo group, nitroso group, pyrrole ring, porphyrin ring, imidazole ring, pyridine ring, pyrimidine ring and pyrazine ring, and contains molecule chosen from hydroxyl group, carboxyl group, aldehyde group, acid halide group, sulfo group, phosphoric acid group, ketone group, ether group and ester group.