An electric wheelchair device includes a seating unit, a wheel unit, and a power unit. The seating unit includes a seat. The wheel unit includes two fixed wheel frames respectively disposed on two sides of the seat, two rotating wheel frames disposed on the outer edges of the two fixed wheel frames, and two tires disposed on the two rotating wheel frames. The two fixed wheel frames are annular. The power unit includes a plurality of magnets disposed on the two rotating wheel frames, a plurality of coils disposed on the two fixed wheel frames, and a controller coupled to the plurality of coils. The controller controls the magnetic force change of the plurality of coils to move the plurality of magnets to respectively control the rotation of the two rotating wheel frames relative to the two fixed wheel frames.一種電動輪椅裝置，包含一乘坐單元、一輪體單元，及一動力單元。該乘坐單元包括一座椅。該輪體單元包括二分別設置於該座椅兩側之固定輪框、二設置於該二固定輪框外緣之轉動輪框，及二設置於該二轉動輪框之輪胎，該二固定輪框概呈環狀。該動力單元包括複數設置於該二轉動輪框之磁鐵、複數設置於該固定輪框之線圈，及一與該複數線圈連接之控制器，該控制器控制該複數線圈之磁力變化以使該複數磁鐵移動，用以分別控制該二轉動輪框相對該二固定輪框轉動。
