A planet wind sail mechanism comprising: a main axis; a driving unit comprising: a rotation frame fixed on the main axis comprising a plurality of ribs; a transmission gear movably disposed on the rib; a fixed gear disposed on the main axis and engaged with the transmission gear; a rotary gear disposed on the edge of the rotation frame and engaged with the transmission gear; and a wind sail body comprising one rotation axis, wherein the rotation axis disposed on the edge of the rotation frame; wherein the wind sail body revolving along the main axis driving both the rotary gear and the wind sail body; wherein the rotary gear rotates in opposite direction with the rotation of the rotation frame; o F wherein the planet wind sail mechanism is characterized in that the wind sail body further comprising: a sail board frame comprising two ends and a sail board axial rod; a change basis unit comprising a slide rail wherein the change basis unit attaching on one end of the sail board frame; a swing shaft disposed in the slide rail; a telescopic board connecting with the swing shaft; and a plurality of sail boards, wherein each sail board comprising a first end and a second end, wherein the first end connecting with the sail board axial rod or the swing shaft and the second end connecting to the telescopic board. a main axis; a driving unit comprising: a rotation frame fixed on the main axis comprising a plurality of ribs; a transmission gear movably disposed on the rib; a fixed gear disposed on the main axis and engaged with the transmission gear; a rotary gear disposed on the edge of the rotation frame and engaged with the transmission gear; and a rotation frame fixed on the main axis comprising a plurality of ribs; a transmission gear movably disposed on the rib; a fixed gear disposed on the main axis and engaged with the transmission gear; a rotary gear disposed on the edge of the rotation frame and engaged with the transmission gear; and a wind sail body comprising one rotation axis, wherein the rotation axis disposed on the edge of the rotation frame; wherein the wind sail body revolving along the main axis driving both the rotary gear and the wind sail body; wherein the rotary gear rotates in opposite direction with the rotation of the rotation frame; o F wherein the planet wind sail mechanism is characterized in that the wind sail body further comprising: a sail board frame comprising two ends and a sail board axial rod; a change basis unit comprising a slide rail wherein the change basis unit attaching on one end of the sail board frame; a swing shaft disposed in the slide rail; a telescopic board connecting with the swing shaft; and a plurality of sail boards, wherein each sail board comprising a first end and a second end, wherein the first end connecting with the sail board axial rod or the swing shaft and the second end connecting to the telescopic board. a sail board frame comprising two ends and a sail board axial rod; a change basis unit comprising a slide rail wherein the change basis unit attaching on one end of the sail board frame; a swing shaft disposed in the slide rail; a telescopic board connecting with the swing shaft; and a plurality of sail boards, wherein each sail board comprising a first end and a second end, wherein the first end connecting with the sail board axial rod or the swing shaft and the second end connecting to the telescopic board.