The invention provides a system and a method for evaluating the foaming ability of a foam scrubbing agent as well as the dynamic property of foams. The evaluating system is of the following structure: a liquid separation tank is connected with a main body device; an observing window is positioned on the side surface of the main body device; a heating plate is attached to the inner wall of the main body device; a pressure balancing pipeline is connected with the top of the liquid separation tank and the top of the main body device; a liquid output pipeline is connected with the top of the main body device; a back-pressure valve and a condensation pipe are arranged on the liquid output pipeline; a collection device is positioned below the liquid output pipeline; a constant-flux pump is arranged on a foam scrubbing agent solution input pipeline at the bottom of the main body device; and a booster pump and a gas flowmeter are arranged on a gas source input pipeline at the bottom of the main body device. The evaluating method provided by the invention is used for evaluating the foaming ability of the foam scrubbing agent as well as the dynamic property of the foams by use of the system for evaluating. According to the system and the method for evaluating the foaming ability of the foam scrubbing agent as well as the dynamic property of the foams, the temperature range for evaluating the foaming ability of the foam scrubbing agent can be widened, and the influence of pressure on the property of the foam scrubbing agent is evaluated.