A temperature and emissivity measurement method is developed based on multispectral radiation thermometry.Three different emissivity models with exponential form were examined for accuracy in temperature measurement.The influence of the measured spectral band was analyzed to get the best spectral model applied to multispectral radiation thermometry.The temperature of pure high temperature thermal radiation material was calculated,considering the surroundings or not separately.The least square data treatment method was improved to solve the nonlinear relation of spectral intensity and the material surface temperature as well as the variable emissivity.The results error analysis of the temperature gives the verification of the data disposal method and shows that the temperature gained from multispectral radiation thermometry (MRT) is acceptable for noncontact measurement.