Pyrolyzing carbon precursors will also lead to a large amount of exhaust gas, which is a waste ofresources and a huge pollution. Therefore, realizing the full utilization of exhaust gas from carbon precursorsis significant. Herein, cobalt (Co) modified hard templates with micropores or mesopores is used toprepare porous carbon for supercapacitors, in which Co species provide the active sites for the captureand deposition of exhaust gas derived from zeoliticimidazolate framework. Using N2 as protective andcarrier gas, the whole process can be realized in a simple tubular furnace. The obtained PC can replicatethe morphology and pore structure of the hard template with the characteristics of micropores or mesoporesrespectively. The microporous structure of PC gives it higher surface area and pore volume than PCwith mesopores, which makes it have high capacitance of 445.7 F g1 in supercapacitor.