Aiming at the problem of automation due to the nonlinear characteristic between the input and output of colorimetric technology, a new kind of intellectual colorimetric temperature measurement system is designed. Its temperature measurement principle and structure are introduced. Software is designed by look-up table and dichotomous search. And temperature is determined by interpolation calculation. So the intellectual calculation of duplex output voltage to temperature value is realized. It has the advantages of small volume, fast response and the like. And the interference from emissivity changes is reduced greatly. Moreover, temperature can be displayed in real time and higher temperature measurement accuracy is guaranteed.