2D/3D　medical　image　registration　is　one　of　the　key　technologies　in　Image-Guided　Interventions.　Clinicians　and　researcher＇s　work　can　be　greatly　enabled　by　building　a　universal　platform　for　2D　and　3D　image　visualization,　processing　and　analysis.　In　this　paper,　we　firstly　review　the　currently　available　software　systems　for　computer　aided　visualization　and　analysis.　Among　all　these　systems,　we　choose　ITK,　VTK　and　QT,　which　can　run　on　Windows,　Unix,　Linux　and　Mac　due　to　its　cross-platform　feature,　thus　can　be　called　universal　platform.　Besides,　procedures　and　algorithms　for　registration　are　also　illustrated.　Finally,　we　show　one　example　of　our　already　realized　2D/3D　medical　image　registration　platform　built　by　ITK,　VTK　and　QT.　The　system　can　be　enriched　and　extended　with　various　kinds　of　algorithms　for　2D/3D　or　even　higher　dimensional　image　registration　in　future　efforts.