Objective：To evaluate the efficacy of CEUS（contrast enhanced ultrasonography） in accessing immediate curative effects of malignant liver tumor after radiofrequency or microwave therapy. Methods：Fifty-six lesions confirmed by contrast CT, CEUS or biopsy were observed. No enhancement through all periods and normalized serologic indexes were considered as the standard of complete treatment. The phenomena such as residual lesions enhanced through the arterial period, diminished through venous and delayed phase, which similar to that before therapy, was considered as standard of incomplete treatment. Consecutive therapy was applied to those regions until that reached complete treatment standard. Results：CEUS can dynamically show the microcirculation characteristics of therapy regions and different appearance of residual lesions. Conclusion：CEUS can show appearances of therapy regions as well as residual lesions，which should help to make supplementary therapeutic plans.