Air pollution consists of a large number of pollutants,which usually have complicated sources and aging pathways.There are interactions among these pollutant species,thereby forming so called combined pollution.To study the formation mechanism and control technology for air pollution,it is necessary to measure the concentrations of major pollutants in the air.However,ultrafine aerosol particles,organic aerosols and volatile organic compounds are especially difficult to detect.This paper introduces the new technologies and methods for measuring air pollutants.Specifically,the recently developed methods for measuring ultrafine aerosol particle formation,volatile organic compounds,and particulate organics are discussed in detail.Besides,a short review of other widely used monitoring methods is also included.