Complementary and alternative medicine (CAM) has been a controversial issue for treating cancer towards patiernts. It is generally accepted that Complementary and alternative medicine (CAM) is not considered to be part of conventional medicine. There is not an easy answer to the kind of support that treating cancer by using Complementary and alternative medicine is beneficial in the long term. National Health Interview Survey (NHIS) data argues that when CAM is treating with several treatments, not only it can improve quality of life in other ways but also decreasing the side‐effects of cancer drugs. However, it seems the reseaarch of NHIS data are based on the population and this study may be affected by sampling error and missing data. this paper analyses using of CAM from different types of race, geographic area, genderand and health status etc. It is concluded that a broad range of CAM interventions are often favored and are an appropriate option along with or even potentially instead of conventional medicine, as long as doctors take complementary and alternative medicine (CAM) carefully and collect the information of patients adequatelly.