Thermal radiation is a crucial topic in university physics education.It employs the dual-bandcolorimetry of thermal radiation and computer vision technology to successfully design and construct anexperimental apparatus for building a flame temperature field distribution model. The apparatus utilizes acomputer vision system to collect and match flame thermal radiation data in different spectral bands.Based onthe theory of dual-band colorimetry, the experimental data is processed to obtain the flame temperature fielddistribution model. Additionally ,an automated data acquisition and calculation program is developed using thePython language. 'Through this apparatus, the study delves into the impact of various factors on flametemperature and temperature field distribution. "he measured experimental data is employed to successfullyvalidate Planck's blackbody radiation law.lt is noteworthy that this apparatus received the first prize in the 9thNational College Student Physics Experiment Competition( Innovation )".