Nonprecious　metal　single-atom　materials　have　attracted　extensive　attention　in　the　field　of　electrocatalysis　due　to　their　low　cost,　high　reactivity,　high　selectivity,　and　high　atomic　utilization.　However,　the　high　surface　energy　of　a　single　atom　causes　agglomeration　during　preparation　and　catalytic　measurement,　resulting　in　damage　to　the　catalytic　sites.　The　strong　interaction　between　substrate　and　monoatoms　is　the　key　factor　to　prevent　the　aggregation　of　individual　metal　atoms,　and　the　geometry　and　electronic　structure　of　the　catalysts　can　be　adjusted　to　optimize　the　catalytic　activity.　Due　to　the　hierarchically　pores,　high　specific　surface　area,　and　defect　effect,　nitrogen-doped　porous　carbon　(NPC)　has　been　widely　studied　as　an　ideal　nonprecious　metal　single-atom　support,　which　synergistically　enhance　the　electrocatalytic　performance　toward　oxygen　reduction　reaction,　oxygen　evolution　reaction,　hydrogen　evolution　reaction,　carbon　dioxide　reduction　reaction,　and　nitrogen　reduction　reaction　with　non-noble　metal　single　atoms.　This　review　summarizes　the　controllable　synthesis,　characterization,　theoretical　calculation,　and　application　of　M　(M　=　Co,　Fe,　Ni,　Cu,　Zn,　Mo,　etc.)　single　atoms　on　nitrogen-doped　porous　carbon.　Finally,　the　future　development　and　challenges　of　nitrogen-doped　porous　carbon　supported　nonprecious　metal　single-atom　electrocatalysts　for　practical　commercialization　are　concluded.