Transition　metal　compounds,　especially　NiS2,　CoS2,　WS2,　and　MoS2　as　noble　metal-free　catalyst　materials,　are　widely　applied　to　replace　Pt　in　the　fields　of　dye-sensitized　solar　cells　(DSSCs)　and　hydrogen　evolution　reactions　(HER).　Meanwhile,　hollow　structures　have　large　specific　surface　area　and　their　large　void　spaces　can　also　effectively　reduce　ion　migration　resistance　and　diffusion　length.　In　this　work,　Ni-CoS2/WS2　and　Ni-CoS2/MoS2　hollow　cuboids　have　been　successfully　synthesized　and　applied　as　promising　bifunctional　electrocatalysts　in　highefficiency　DSSCs　and　HERs.　In　detail,　nickel-cobalt　hydroxide　cuboids　were　prepared　and　served　as　selfsacrificing　templates　to　react　with　(NH4)2WS(4)　or　(NH4)(2)MoS4　at　room　temperature,　and　then　mixed　with　sulfur　powder　for　annealing　treatment.　Besides,　Ni-CoS2　hollow　cuboids　were　synthesized　as　a　reference.　Profiting　from　the　stable　hollow　structure,　large　specific　surface　area,　abundant　effective　active　sites　exposed　by　WS2,　and　synergistic　effect　of　multiple　elements,　Ni-CoS2/WS2　hollow　cuboids　manifested　a　preeminent　performance.　Compared　with　Pt　(8.06%),　the　conversion　efficiency　of　Ni-CoS2/WS2　hollow　cuboids　had　reached　9.41%　as　counter　electrode　for　DSSCs.　As　for　HER,　it　exhibited　the　lowest　overpotential　of　72.4　mV@10　mA　cm-2　and　had　the　minimum　Tafel　slope　(56.1　mV　dec(-1))　compared　with　Ni-CoS2/MoS2　and　Ni-CoS2.