To　study　the　behavior　of　the　badminton　gymnasium　for　2008　Olympic　Games　in　case　of　fire,　numerical　simulation　of　the　temperature　field　is　performed,　which　is　based　on　the　model　of　air　temperature　rising　for　large　buildings.　By　defining　pre-stress　loss　in　calculation　program,　the　influences　of　temperature　variations　on　cable　forces　is　reflected.　Corresponding　analysis　involving　geometry　and　material　nonlinearities　are　carried　out　to　predict　the　behavior　of　the　structure.　The　results　shows　that　90minutes　after　the　structure　is　exposed　to　fire,　there　are　significant　reductions　in　circumferential　cable　forces　except　the　outmost　one,　and　there　is　about　one　fifth　decline　in　overall　stability　capacity　without　losing　its　safety.　The　studies　indicates　that　thermal　creep　of　material　can　hardly　influence　the　bearing　capacity,　and　can　be　neglected　in　anti-fire　analysis.