Accurate measurement of flame temperature is always an important research topic,which is significant for the establishment of combustion models,exploration of atomization mechanisms,combustion reaction mechanisms and reduction of pollutants emissions during combustion processes,etc.Non-contact flame temperature measurement method is a preferred important flame diagnostic technique on account of scarcely any disturb on combustion regime,and atomic spectroscopy-based techniques have drawn wide attention and been widely applied in the field of high temperature diagnosis because of their inherent non-contact characteristics.Atomic spectroscopy methods play an important role in non-contact methods because of the features of single spectrum,strong spectral signal and user-friendly operation.The main principle of atomic spectroscopy methods is that atoms occupy on different energy levels which obey Boltzmann distribution under thermodynamic equilibrium and thus flame temperature could be obtained from corresponding atomic spectrum signals’ ratio.According to the distinctions of utilized spectra,atomic spectroscopy methods could be divided into three categories,i-e.,atomic absorption spectroscopy method,atomic emission spectroscopy method,and atomic fluorescence spectroscopy method.The correlative principles,development and application of the atomic spectroscopy methods,including two-line atomic absorption spectroscopy method,two-line atomic emission spectroscopy method,Boltzmann plot method and two-line atomic fluorescence spectroscopy method are simply summarized in this review.