SFE method is used to evaluate the moisture susceptibility of foamed warm asphalt. Foamed warm asphalt has lower total SFE, but has higher acid base SFE component. Foaming water do not seem to have significant effects on the total SFE of asphalt. The wettability and work of adhesion have an improvement after asphalt foamed. The effect of foaming water on the work of debonding is negative.