NOVELTY - Core metal or alloy nanoparticles-supported carbon carrier as base catalyst, is prepared. A working electrode is prepared by adding base catalyst to solution containing binder in alcohol, ultrasonically dispersing catalyst slurry, coating slurry on substrate and drying. Pulsed electrodeposition is carried out by placing the working electrode in nitrogen-saturated hydrogen perchlorate solution, carrying out surface activation and reduction of catalyst nanoparticles on substrate, and initiating pulse electrodeposition, and core-shell structured catalyst is manufactured.    USE - Manufacture of core-shell structured catalyst used as anode or cathode for fuel cell e.g. hydrogen-oxygen fuel cell, direct methanol fuel cells or direct formic acid fuel cell, and catalyst for methanol oxidation, formic acid oxidation and reduction of oxygen, hydrogenation catalyst and oxidation catalyst in chemical industry (claimed).    ADVANTAGE - The method efficiently provides economical core-shell structured catalyst having high productivity and stability, by simple without requiring inert gas atmosphere.    DETAILED DESCRIPTION - Core metal or alloy nanoparticles-supported carbon carrier as base catalyst, is prepared by pretreating carbon carrier, supporting core metal or alloy nanoparticles on carbon carrier. The core metal includes ruthenium, palladium, rhodium, iridium, silver, gold, cobalt or nickel. The alloy nanoparticles includes binary alloy comprising ruthenium, palladium, rhodium, iridium, silver, gold, cobalt or nickel, or ternary alloy comprising ruthenium, palladium, rhodium, iridium, silver, gold, cobalt or nickel. The carrier comprises XC-72R carbon black, carbon nanotubes or graphene. The content of core metal or alloy nanoparticles loaded on the carbon carrier is 10-40 wt.%. The size of nanoparticles is 1-10 nm. The core metal or alloy nanoparticles are supported on carbon carrier by impregnation-reduction method, sodium borohydride reduction method or high-pressure organic sol-gel method. A working electrode is prepared by weighing base catalyst, adding to solution containing binder in an alcohol, ultrasonically dispersing catalyst slurry, coating slurry on the surface of a substrate, and drying, or adding base catalyst directly to the substrate working solution for electrodeposition of metals contained in the shell, stirring, contacting the catalyst substrate and forming cathode substrate. The emulsion binder includes polytetrafluoroethylene, perfluorosulfonic acid resin or fluorocarbon resin emulsion. The content of dry mass of polymer resin is 1-30 %mass with respect to content of catalyst. Alcohol includes ethanol or isopropanol. The working electrode comprises glass substrate of carbon, platinum plate, platinum-plated titanium or titanium. The drying methods include infrared lamp irradiation drying, oven drying or natural drying. Pulsed electrodeposition is carried out by placing resultant working electrode in a nitrogen-saturated 0.1 M hydrogen perchlorate solution, carrying out surface activation and reduction of catalyst nanoparticles on the substrate, quickly transferring to nitrogen saturation of electrode and shell containing salt, complexing agent, and electrodeposition solution and conductive additive, inserting auxiliary electrode and reference electrode, setting pulse frequency, initiating pulse electrodeposition. Thus, core-shell structured catalyst is manufactured.