With　the　increase　in　the　number　of　senior　citizens　and　disabled　persons,　there　is　a　growing　demand　for　human-friendly　wheelchairs　as　mobility　aids.　Wheelchair　is　often　controlled　by　hands　via　joysticks,　so　it　is　inconvenient　and　difficult　for　persons　in　wheelchairs　to　play　sports.　To　solve　this　problem,　this　paper　presents　a　method　of　motion　control　based　on　sitting　postures,　including　direction　and　speed　hand-free　control.　The　high-speed　analog　data　acquisition　system　provides　enough　information　according　to　the　sitting　postures　of　the　wheelchair　users,　where　four　force　sensors　are　installed　under　the　seat.　The　intelligent　wheelchair　control　system　will　calculate　gravity　centre　of　human　body　and　decide　to　move　in　which　direction　and　provide　proper　speed　to　control　the　motors.　At　the　same　time,　it　shows　the　dynamic　moving　directions　and　creates　a　real　time　path　map　of　the　intelligent　wheelchair　to　guide　the　users.　This　control　mode　will　give　the　disabled　or　the　wheelchair　athletes　more　opportunities　not　only　for　sports,　but　also　for　some　other　everyday　work.　The　results　of　experiments　and　simulations　indicate　that　this　intelligent　wheelchair　control　system　effectively　provides　mobility　and　autonomy　to　the　target　population.　©　2011　IEEE.