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research was basically carried out to extend the application of CO2 absorption processes for flue-gassystem, which are mainly applied to a reforming process in petro-chemical industries. In general, MEA absorbent hassome problems in flue-gas treatment, such as, degradation, regeneration energy and absorption capacities. As we known,lems. In this paper, the characteristics of CO2 absorption in aqueous AMP solution were measured and compared withthat of MEA. It has ben found that the CO2 absorption capacity in AMP is double than that of MEA in the low CO2partial pressure system such as flue-gas. Also, the equilibriums of CO2-AMP system were partially sugested, which areessentially needed to design the absorption process.