As　the　rapidly　growing　number　of　disabled　people　in　China,　the　role　of　electric　wheelchair　becomes　important　to　enhance　the　mobility　for　them.　Many　researchers　pay　attention　to　how　to　solve　the　problems　in　daily　life　for　the　wheelchair　users,　rarely　cares　for　their　physical　exercises.　In　this　paper,　a　control　method　of　intelligent　tennis　wheelchair　based　on　seat　pressure　sensors　and　omnidirectional　wheels　is　introduced.　The　relationship　between　human　intention　and　the　changes　of　gravity　center　on　wheelchair　seat　is　described　in　details.　Hence,　this　system　combines　with　the　traditional　inputs　in　order　to　form　a　multimodal　system.　The　user　could　control　the　wheelchair　in　manual　or　automatic　mode.　In　manual　mode,　user　controls　the　wheelchair　depending　on　conventional　joystick　device.　While　in　automatic　mode,　according　to　value　of　weight　shift　measurement,　we　infer　the　user＇s　intension　based　on　fuzzy　controller.　In　addition,　we　developed　an　intelligent　wheelchair　interface　in　order　that　those　modules　could　be　switched　conveniently　and　freely.　Finally　some　experimental　results　show　that　the　developed　intelligent　wheelchair　works　correctly　and　effectively　in　practice.　©　2012　IEEE.