Research studies of Qigong therapy for cure for the past 20 years were reviewed from three different categories: clinical study on human patients, in-vitro study of abnormal cells, and in-vivo study of abnormal cell with Qigong therapy, in an attempt to understand the role Qigong therapy plays in many kinds of disease. There is a lot of evidence suggesting that Qigong therapy has an inhibitory effect on abnormal cell growth, both in vitro and in vivo studies, as well as in clinical observation (often there was room for improvement in these studies and some studies require replication in order to verify their findings). Qigong therapy is an area that is often neglected by mainstream medicine and research, and it should be seriously examined and considered as an important supplement to conventional treatment.