In this paper,the research advances in the in-line measurement techniques for com-bustion and flow field at Institute of Particle and Two-Phase Flow Measurement,University of Shanghai for Science and Technology have been presented.The flame radiation temperature measurement technique with fiber-based spectrometer has been improved,the flame temperature measurement accuracy and range were increased.Moreover,the flame emissivity and fuel compo-sition can be obtained.Temperature and water vapor concentration for detonation flame were de-termined by combining radiation and absorption spectroscopy methods.The spray droplet tem-perature was measured based on laser-induced fluorescence.Concentration of polluting gas emis-sions(SO2 and NOx)were obtained by differential optical absorption spectroscopy (DOAS)meth-od interfered by high density of dust and water droplets.Hg continuous monitoring system with spectroscopic method based on saturated vapor theory was developed.The temperature field of high-temperature object was measured with combination of spectroscopy and imaging methods. The velocity vector field and granularity distribution of multiphase flow were studied with single-frame and single-exposure imaging method.The liquid-phase parameter (film thickness and tem-perature)and vapor-phase parameter (water vapor temperature above the liquid film)during the liquid film evaporation process were simultaneously measured by tunable diode laser absorption spectroscopy (TDLAS).