The paper proposes spectral-brightness pyrometry (SBP) as a new approach to measure the temperature field dynamics on the emitting body surface. The brief review of modern methods of pyrometry - radiometric temperature measurements - is presented. Their properties are analyzed in the Wien's approximation. The SBP combines the high resolution on temperature, time, and space typical for the brightness pyrometry instruments, and small methodical error of temperature measurements of materials with unknown emissivity intrinsic for spectral pyrometers. The peculiarity of this method is calibration of the brightness pyrometer - thermal vision camera - directly during the measurement process using the integral thermal radiation spectrum of the object. The mathematical model of the SBP measurement system is proposed, the technique of data processing based on this model is verified. The examples of practical implementation of the SBP method for the determination of temperature field dynamics of objects with unknown emissivity are presented. (C) 2017 Elsevier Ltd. All rights reserved.