A　simple　method　for　measurement　of　temperature　field　in　the　region　near　to　the　metal　plate　of　the　radiator　is　demonstrated　by　using　digital　holography　in　the　Lensless　Fourier　transform　configuration　(LFT).　The　temperature　is　measured　within　the　boundary　layer　of　the　convective　flow　field.　The　deviation　of　the　temperature　produced　by　this　method,　from　that　obtained　by　the　thermocouple　is　rather　small.　It　has　shown　that　the　method　is　reasonable　and　efficient.　2009　SPIE.