The department was founded in 1983 initiated by Prof. Wang Jingbo、Xi Ning & Wu Dake with high reputations in China, and started to treat patients on May, 1987, with the guidance of Prof. He Yirong. With the help of famous oncologists Yu Zihao, Yin weibo & Xu guozheng from the Chinese Academy of Medical Sciences Cancer Institute & Hospital, the primary expert team led by Prof. Lang Jinyi has been composed with the mission of cancer diagnosis and treatnemt in 1990. In 2003, the Dept. was nominated a key medical center of the Sichuan Province, and it was the only oncology radiotherapy center awarded with a class A appellation in Sichuan. In 2013, Prof. Lang became the chairman of Chinese Society for Radiation Oncology (CSTRO). In 2014, the department was built as a national key clinical Department of Oncology.