Multifunctional　solar　energy　conversion　offers　a　feasible　strategy　to　solve　energy,　environmental　and　water　crises.　Herein,　a　series　of　platinum(II)-tethered　chalcogenoviologens　(PtL+-EV2+,　E=S,　Se,　Te)　is　reported,　which　integrate　the　functions　of　photosensitizer,　electron　mediator　and　catalyst.　PtL+-EV2+　(particularly　for　PtL+-SeV2+)-based　one-component　solar　H-2　production　could　be　triggered　not　only　by　EDTA,　but　also　by　facultative　anaerobic　and　aerobic　bacteria　relying　on　a　simplified　mechanism,　along　with　efficient　antibacterial　activities.　In　addition,　by　using　real　pool　water,　PtL+-SeV2+　achieved　multiple　functions,　including　H-2　production,　antibacterial　action　and　acid　removal,　which　supplied　a　new　strategy　to　solve　various　problems　in　real　life　via　a　single　system.