Objectives : Many cancer patients use therapies promoted as literal alternative and complementary medicine to conventional medical care. So the health provider has to guide it by appropriate clinical guideline. The purpose is to indicate the international research tool of korean medical oncology for related investigators and help to make the clinical guideline for korean oncology. Method : We reviewed complementary and alternative therapies for cancer and cancer-related symptoms by searching MEDLINE, and using the name and synonyms of the therapy. Publications on complementary medicine were identified by searching the Cochrane Library. Results and Conclusion : Most complementary and alternative medicine used by cancer patients have demonstrable, important benefits, including decreased symptoms and better quality of life. We have to standardize the scientific research protocol for korean oncology and build evidence based medicine in the future.