The　research　on　temperature　and　heat　flux　during　mode　switching　process　of　unitized　regenerative　fuel　cells　is　importance.　Thus,　in　this　paper,　the　local　temperature　and　heat　flux　are　measured　during　mode　switching　using　self-made　thin　film　sensors,　and　heat　transfer　coefficient　is　also　obtained.　The　results　of　the　experiment　exhibit　that　the　temperature　and　heat　flux　change　significantly　during　mode　switching,　and　periodically　change　with　periodic　mode　switching,　the　heat　generation　is　greater　than　the　heat　dissipation　inside　the　cell.　During　mode　switching,　the　temperature　and　heat　flux　are　higher　in　upstream,　and　the　temperature　and　local　heat　transfer　coefficient　increase　along　main　gas　flow　direction.　The　fuel　cell　current　density　has　a　great　influence　on　heat　transfer　when　cell　mode　switches.　At　different　current　density,　the　temperature　and　heat　flux　show　different　changing　trend　when　the　cell　switches　from　electrolytic　cell　mode　to　the　fuel　cell　mode.　These　experimental　results　can　provide　guidance　to　make　fuel　cell　run　more　efficiently　in　practical　application.