NOVELTY - Nitrogen-containing macroporous carbon material is crushed to the grain size of 100-400 meshes, added to hydrothermal reaction kettle, and then imidazole and its derivatives are added to the kettle. An aqueous solution of transition metal-containing metal salt is then added to kettle, ultrasonically vibrated, and processed in oil bath. The resultant product is then filtered, washed using deionized water, and dried at 90 degrees C under vacuum condition, to obtain imidazole and its derivative-containing macroporous carbon loaded transition metal catalyst.    USE - Preparation of imidazole and its derivative-containing macroporous carbon loaded transition metal catalyst used as cathode for fuel cell or air battery.    ADVANTAGE - The method efficiently and economically provides imidazole and its derivative-containing macroporous carbon loaded transition metal catalyst having excellent conductivity, uniform size, large specific surface area and high stability, in short period of time.    DETAILED DESCRIPTION - Hydrophilic nano calcium carbonate, urea and glucose are added to deionized water, ultrasonically vibrated for 30 minutes, and urea and glucose are dissolved to form a suspension. The resultant suspension is solidified for 6 hours, cured at 106 degrees C under nitrogen protection, and constant-temperature carbonizing process is carried out at 900 degrees C for 2 hours to form carbide carbonized product. The obtained carbonized product is processed using hydrochloric acid having concentration of 5-30 wt.% at 80 degrees C, and washed using sodium hydroxide solution and deionized water. The resultant product is filtered, and dried at 120 degrees C for 4 hours to obtain nitrogen-containing macro-porous carbon material. The mass ratio of hydrophilic calcium carbonate, urea, glucose and deionized water is 8:8:8:100. The obtained nitrogen-containing macroporous carbon material is crushed to the grain size of 100-400 meshes, added to hydrothermal reaction kettle, and then imidazole and its derivatives are added to the kettle. An aqueous solution of transition metal-containing metal salt is then added to the kettle, ultrasonically vibrated for 20 minutes, and processed in oil bath at 100-300 for 12 hours. The resultant product is then filtered, washed using deionized water, and dried at 90 degrees C under vacuum condition, to obtain imidazole and its derivative-containing macroporous carbon loaded transition metal catalyst. The ratio of nitrogen-containing macro-porous carbon material, imidazole and its derivatives and transition metal salt and water is 2 g:0.02-0.4 g:1.2-6 mmol:100 ml. The transition metal salt is nitrate, sulfate or chloride of platinum, palladium, silver, manganese, iron, cobalt, nickel and/or copper.