Since the industrial revolution,global climate change problems caused by greenhouse effect are getting more and more concern.CO2，CH4，N2O and CO related to human activities are main greenhouse gases in the atmosphere.It is of important significance for atmospheric environmental science to access greenhouse gases′ concentration variation with time.CO2，CH4，N2O and CO are continuously monitored by using multi-reflected white cell Fourier transform infrared(FTIR)spectrometer at a specific site in Zhejiang.The concentration of components information is obtained by measuring gas atmospheric absorption spectra and concentration variation is also analyzed.In the meantime the performance of instrument is tested and the results show that multi-reflected FTIR of environmental gases monitoring is a fast,direct and effective means of monitoring.