Molybdenum　sulfide　(MoS2)　is　considered　as　low-cost　catalyst　with　great　potential　for　hydrogen　evolution　reaction　(HER).　In　this　contribution,　a　promising　Mo-precursor　was　first　designed　and　prepared　via　partial　reduction　of　commercial　(NH4)(6)Mo7O24　center　dot　4H(2)O　by　DL-tartaric　acid.　A　simple　pyrolysis　method　as　a　new　＂bottom-up＂　approach　was　then　developed　to　achieve　the　desired　HER　catalysts　by　using　the　Mo-precursor.　The　resulting　catalysts　consist　of　multiphasic　1T/2H-MoS2　and　residual　S,　N　co-doped　carbon　(SNC)　with　oxygen　functional　groups.　In　comparison　with　(NH4)(6)Mo7O24　center　dot　4H(2)O,　Mo-precursor　with　high　content　of　Mo5+　promotes　the　full　formation　of　MoS2,　while　its　high　content　of　carbon　is　more　favorable　to　gain　the　residual　SNC　in　the　resulting　catalysts.　The　further　results　demonstrate　that　the　percentages　of　1T-MoS2　and　the　content　of　the　residual　SNC　can　be　facilely　tuned　by　the　pyrolysis　temperatures　or　the　Mo/S　feeding　molar　ratios.　Notably,　although　the　resulting　catalysts　exhibit　the　＂bulk＂　and　irregular　morphology　with　low　specific　surface　areas,　the　high　percentages　of　1T-MoS2　as　the　primary　advantage,　the　highly　exposed　active　sites　mainly　stemming　from　disordered　stacking　of　S-Mo-S　layers,　and　the　high　content　of　the　SNC　residues　are　synergistically　responsible　for　their　high　electrocatalytic　HER　activity.　The　high　thermal　stability　of　1T-MoS2　and　the　excellent　durability　and　stability　during　HER　processes　are　attributed　to　the　stabilizing　effects　of　the　residual　SNC.　Under　the　optimized　synthetic　conditions,　the　achieved　Mo/S(0.2)-450　has　a　low　overpotential　of　similar　to　130　mV　at　10　mA　cm(-2),　a　low　Tafel　slope　of　77　mV　dec(-1),　a　high　specific　activity　of　17.53　mu　A　cm(Cat　center　dot)(-2),　and　the　excellent　durability　and　stability　in　0.5　M　H2SO4.　This　work　can　provide　a　promising　Mo-precursor　and　a　facile　route　to　developing　the　highly　efficient　HER　catalysts.