Abstract:Negativeairionscancleanairandimproveairconditions.Theconcentrationofnegativeairionisanimpor- tantindicatorofairqualityandisofgreatsignificancetotheenvironment.Therefore,manyscholarshavedonealotof appliedresearchesonthelawofvariationandinfluencingfactorsoftheairnegativeionsconcentration.Inthispaper,we summarizesthefunction,formationandmeasurementmethodsofnegativeairions,andthetemporalandspatialdistribu- tionandinfluencingfactorsofnegativeairions,inordertoprovidereferenceforsubsequentresearch.