The　triboelectric　nanogenerator　(TENG)　based　on　the　contact-electrification　and　electrostatic　induction　are　attractive　for　the　abundant　application　in　many　disciplines.　To　explore　the　practical　application　of　TENG　devices,　we　firstly　reported　a　novel　TENG　based　on　the　white　sugar　(WS-TENG)　to　harvest　mechanical　energy,　and　simultaneously,　which　can　also　serve　as　the　self-powered　humidity　sensor　due　to　the　essential　hydrophilic　property　of　white　sugar　molecules.　In　this　work,　the　polytetrafluoroethylene　(PTFE)　film　and　white　sugar　play　the　role　of　triboelectric　parts.　Moreover,　the　electrical　output　of　WS-TENG　involved　in　the　short-circuit　current　(Isc)　and　open-circuit　voltage　(V-oc)　can　get　to　6.35　mu　A　and　95.68　V,　respectively.　The　fabricated　WS-TENG　has　good　long-term　durability　and　reliability.　According　to　the　experimental　results,　the　self-powered　humidity　sensor　based　on　the　WS-TENG　can　reflect　the　humidity　change　of　the　environment.　The　current　research　could　effectively　promote　the　practical　application　of　TENG　devices.Y