Abstract: Reactive nitrogenous compounds play a crucial role in atmospheric chemistry, as their removal and deposition processes directly influence the atmospheric nitrogen cycle and the formation of secondary pollutants. Due to their abundance in the atmosphere, diverse concentrations, and active chemical properties, the accurate measurement of these compounds remains a significant challenge in current research. This study provides a comprehensive overview of the measurement techniques for typical reactive nitrogenous compounds, including NO, NO₂, PAN, HONO, HNO₃, ANs, and N₂O₅, along with recent progress in the development of gaseous standard materials for these compounds. It highlights that mass spectrometry, spectroscopy, and wet chemistry have been widely applied for in situ measurements of various reactive nitrogenous compounds, with measurement uncertainties ranging from 4% to 30%. These methods require reliable standard sources for parameter calibration and routine maintenance. However, except for NO_x, most reactive nitrogenous compounds still lack standardized sources and parameter calibration protocols. This review further outlines the challenges and future directions in this field, offering insights into subsequent research developments.