In this paper, a dual-illumination-beam and dual-reference-beam holographic system is designed with which interferograms of flame temperature field over a 90° angle of view are obtained instantaneously. A simple reconstruction metod is discussed. The effects of projection number and the measurement error on the reconstruction precision are determined by computer simulation. The temperature distribution in a plane are reconstructed from the experimental data. The results are compaed with thermocouple measurement.