As one of the important trace gases in the atmosphere， nitrogen dioxide （NO₂） is an important weather vane to measure the state of air pollution and have been associated with human health. Compared with traditional ground-based observations， space-borne sensors can provide large-scale and long-term observational data， overcoming the limitations of the number and location of observation sites. This paper reviewed the development of the space-borne hyper-spectral sensors at home and abroad， the retrieval algorithms of tropospheric NO₂ vertical column density， and also discussed the accuracy of the tropospheric NO₂ products.With the development of technology， the resolution of the time， space and spectral are getting higher and the selection of the retrieval model and algorithm of the NO₂ column density product are getting more reasonable，so the NO₂ products are more accurate.