The center features technology introduction: Stereotactic three-dimensional conformal precise radiotherapy (3D-CRT): The tumor treatment equipment grating automatically adjusts according to the shape of the tumor, so that the irradiated area is consistent with the shape of the target area, and the surrounding normal tissues are less irradiated or not irradiated. It is suitable for the treatment of various parts of the body and various tumors. Three-dimensional conformal precise intensity modulation radiotherapy can meet the requirements of spatial conformation of tumor and different doses in the target area, so that the tumor area and the preventive irradiation area receive different doses of irradiation, while better protecting the surrounding normal tissues and organs. Stereotactic radiosurgery (SRS): A technique that uses stereotactic technology to precisely locate tumor lesions, irradiate the target area with a single high dose of small field set beam, and implement surgical treatment. It is suitable for patients with intracranial tumors with relatively regular morphology and maximum tumor diameter ≤ 5 cm, such as meningioma, glioma, auditory neuroma, brain metastases, etc. Stereotactic radiation therapy (SRT): A radiation therapy technique that uses stereotactic technology to precisely locate tumor lesions and irradiate tumor target areas with small field fractions. The significance of carrying out stereotactic fractionated radiotherapy: 1. Breakthrough the traditional radiotherapy mode of 1 time per day, 5 times per week, 8~10Gy per week, which can increase the dose of tumor target area compared with the traditional mode; 2. Combine the classical radiotherapy mode with SRS technology to give full play to the advantages of each; use the classical radiotherapy mode to eliminate radiotherapy sensitive, infiltrating growing tumor cells and satellite lesions; use SRS to locate accurately and The small field non-coplanar high-dose irradiation technique is used to destroy radiotherapy-insensitive core lesions. It is suitable for patients with body tumors, such as peripheral lung cancer, metastatic lung cancer, liver cancer, bile duct cancer, pancreatic cancer, retroperitoneal metastatic cancer, pelvic tumors, etc.