Abstract: In the study of combustion, the temperature and spatial distributions of temperature field, velocity field, species field and pressure field are very important. In order to calculate the heat conduction, heat convection and heat radiation or to capture the flame zone, the most direct way is to obtain the temperature of the combustion field. In recent years, non-intrusive laser-based diagnostic technology has advanced rapidly. The Rayleigh scattering thermometry, laser-induced fluorescence(LIF), laser-induced phosphorescence (LIP), Raman scattering thermometry, coherent anti-Stokes Raman scattering (CARS), degenerate four-wave mixing (DFWM), and tunable diode laser absorption spectroscopy (TDLAS) have been successfully used in temperature diagnostics in combustion studies. The basic working principles and applications of the technique above were reviewed in this papper, and it has a certain reference value for researchers engaged in related fields.