Molybdenum　disulfide　(MoS2)　has　a　Gibbs　free　energy　comparable　to　platinum　(Pt),　suggesting　it　can　replace　Pt　as　a　hydrogen　evolution　reaction　(HER)　catalyst.　However,　the　shortcomings　of　the　restricted　number　of　MoS2　active　sites　and　poor　intrinsic　electrical　conductivity　have　resulted　in　impeding　its　widespread　application.　In　this　work,　Co/MoS2@NPC　electrocatalyst　was　prepared　by　using　nitrogen-doped　porous　carbon　(NPC)　as　a　substrate　material,　and　then　hydrothermally　anchoring　cobalt-doped　molybdenum　disulfide　(Co-doped　MoS2)　on　the　substrate.　Co/MoS2@NPC　was　subsequently　applied　to　hydrogen　evolution　reaction　in　acidic　and　alkaline　media.　It　was　found　that　the　overpotential　of　0.2Co/MoS2@NPC　was　only　139　mV　for　HER　at　10　mA　cm　(-2)　with　a　Tafel　slope　of　69　mV　dec　(-1)　in　acidic　medium;　while　in　alkaline　medium,　its　overpotential　was　163　mV　with　a　Tafel　slope　of　106　mV　dec　(-1),　and　it　operated　stably　over　10　h.　The　superior　HER　performance　may　be　related　to　the　point　that　NPC　as　a　substrate　can　uniformly　disperse　MoS2,　exposing　more　active　sites　and　ensuring　high　electronic　conductivity　of　MoS2.　In　addition,　the　introduction　of　Co　into　MoS2　changed　the　intrinsic　activity　of　MoS2　and　interacted　with　CoSx　and　pyridine　nitrogen　in　NPC,　constituting　a　ternary　catalytic　interaction.　Therefore,　this　study　provides　a　novel　strategy　for　optimizing　the　HER　activity　of　MoS2.