The　prediction　of　body　posture　is　necessary　for　preventing　the　falls　of　elderly　people.　The　prediction　accuracy　of　traditional　methods　will　get　worse　when　the　predicting　time　becomes　longer.　This　paper　focuses　on　the　body　posture　prediction　accuracy　of　the　sequence　to　sequence　model.　The　posture　model　of　waist,　foot,　and　shoulders　was　built　and　tested.　The　experiments　show　that　sequence　to　sequence　model　has　a　high　prediction　performance.