Basing on the research of the bibliography of Regression Therapy, we found that the Regression Therapy has been developed since 70 or 80 years ago. Regression Therapy is to do therapy by regressing client's past issues, and finding out the cause and effect of disease or problem. The skills of Hypnotherapy are normally used to help client recall the past experiences of subconsciousness. The research of Regression Therapy covers a wide range, including fetus, newborn baby, experience of early childhood, previous life, the world after death, contacting the future, and so on. Its skills are special and are able to transcend the limitation of time and space. Although there are different opinions on Regression Therapy, its effect seems remarkable and has positive influence on the body, mind and spirit. It is also helpful for understanding life and death and the developing of love for sentient beings according to the research.