Wind　turbine　towers　are　growing　taller　to　obtain　larger　thrust　load　and　capture　more　wind　energy　at　higher　elevations.　To　address　the　excessive　vibration　problem　of　conventional　steel　tube　(ST)　towers,　a　concrete-filled　double-skin　tubular　(CFDST)　tower　can　be　a　great　alternative　owing　to　the　advantages　of　excellent　mechanical　properties　and　cost　efficiency,　especially　for　tall　and　slender　wind　turbines.　This　paper　developed　a　theoretical　model　of　the　CFDST-based　wind　turbine　system　by　combining　the　Lagrangian　method　with　the　Galerkin　method.　Subsequently,　the　analytical　solutions　of　both　fundamental　frequency　and　cross-wind　displacement　response　were　obtained.　The　wind　tunnel　tests　of　scaled　CFDST　and　ST　wind　turbine　systems,　with　variations　in　hollow　ratio,　tube　length,　and　wind　speed,　were　used　to　verify　the　proposed　model.　The　predicted　results　from　the　analytical　model　showed　reasonable　agreement　with　the　test　results.　Finally,　the　validated　analytical　solutions　were　employed　to　further　analyze　the　influence　of　hollow　ratio,　length-to-diameter　ratio,　and　tip-mass　ratio.　This　study　makes　a　contribution　to　the　integration　analysis　of　the　CFDST-based　wind　turbine　system　in　theory　and　experiment,　and　develops　a　simplified　method　to　predict　its　dynamic　behavior.