This　paper　presents　a　heat　transfer　model　for　the　hyperthermia　treatment　of　cervix　cancer　using　a　intracavitary　microwave　applicator　and　based　on　which　the　3-D　finite　element　simulation　of　the　temperature　fields　have　done.　Before　then　the　specific　absorption　rate　(SAR)　distribution　for　the　transvaginal　probe　have　been　measured　in　a　phantom.　The　variations　of　the　parameters　have　been　investigated,　too,　for　optimization.　At　last,　the　results　of　simulation　are　compared　to　that　measured　in　the　phantom　and　some　instructive　conclusions　are　presented　for　critical　application.