Studies of life quality as a sociological indicator originated in the U.S. in the 30s of the 20 th century. With the change of the disease spectrum and the medical model, the implication of the concept of health has been expanded. Towards the end of the 70s, life quality studies started in the medical field and gradually flourished, resulting in the development of hundreds of measured quantity tables. The deepening of such studies has brought about increasingly bigger effects on modern medical sciences. These effects can be seen in the following aspects: ①changes of medical thinking, objective and concepts; ②patients*s participation in the choice of their treatment plans; ③new medical treatment and nursing regulations; ④the making of medical administration and health decisions; ⑤development of new drugs, which must take into consideration effects on life quality; and ⑥management of medical records.