In this work, the iron nanoparticles were formed after the pulse UV laser photolysis of Fe(CO)(5) vapor in argon atmosphere. The second laser pulse was implemented for heating of formed iron nanoparticles at different times from the moment of its formation. The registration of incandescence signals from laser-heated nanoparticles allowed measuring the particle evaporation temperature and their size using laser-induced incandescence technique. Simultaneous application of the laser-induced incandescence and the laser light extinction techniques provided an observation of the particle evaporation process caused by laser heating. The particle evaporation temperature was found to be in the range of 2100-2600 K in dependence on particle size and pressure of bath gas. The known semi-empirical equations described size dependence of nanoparticle properties were tested by a comparison of calculated and experimental data on iron nanoparticle evaporation temperature.