A wind dam device comprises a support frame unit, a power generation unit, and a flow guiding unit. The support frame unit comprises two horizontally, intervally arranged vertical columns. The power generation unit comprises at least one wind power generation module disposed between the vertical columns and a battery electrically connected with the wind power generation module. The wind power generation module comprises a hub which can be horizontally and axially pivoted to drive a power generator for generating electricity. The hub comprises a plurality of intervally arranged wheel frames and a plurality of blades which are arranged in a circular manner and disposed at intervals between the wheel frames. The flow guiding unit comprises a flow guiding hood formed in an arc shape and pivotally disposed between the vertical columns, in which an upper edge of the flow guiding hood is not lower than a pivoting axis of the hub and a lower edge is lower than the lower edge of the hub.一種風壩裝置,包含一支架單元、一發電單元,及一導流單元。該支架單元包括二水平間隔設置的立柱。該發電單元包括至少一設置於該等立柱之間的風力發電模組,及一電連接該風力發電模組的蓄電池。該風力發電模組具有一能沿一水平軸向樞轉,以帶動一發電機產生電力的輪轂。該輪轂包括複數相間隔的輪框,及複數環狀且間隔地設置於該等輪框之間的葉片。該導流單元包括一能樞轉地設置於該等立柱之間,且呈弧狀的導流罩。其中,該導流罩的上緣不低於該輪轂的樞轉軸心,且該導流罩的下緣低於該輪轂的下緣。100‧‧‧支架單元110‧‧‧立柱111‧‧‧柱體112‧‧‧組合部200‧‧‧發電單元210‧‧‧風力發電模組211‧‧‧發電機212‧‧‧輪轂213‧‧‧輪框214‧‧‧葉片220‧‧‧蓄電池300‧‧‧導流單元310‧‧‧導流罩311‧‧‧樞接部320‧‧‧驅動器400‧‧‧控制單元500‧‧‧容置空間
