Foam profile-controlling and flooding system has the advantages of wide source，low cost，low damage and selective plugging ability，which can effectively improve the heterogeneity and enhance oil recovery. The current foam profile-controlling and flooding system consisted of conventional liquid foam，polymer enhanced foam，gel enhanced foam and particle enhanced foam. The characteristics of different types of foam system，the mechanism of enhancing foam stability and the percolation law of foam in formation were summarized. The field application of foam profile-controlling and flooding system was introduced. The problems and research direction of foam profile-controlling and flooding system were pointed out.