Abstract: Radiotherapy is the main treatment method of early lung cancer not undergoing surgery for medical reasons and advanced non-resectable lung cancer. The local regional control of lung cancer requires high-dose irradiation, but this treatment is restricted by normal tissue tolerance. The measurement and control of errors are crucial for safe implementation of lung cancer precision radiotherapy. Lung tumor radiotherapy error sources, the methods to control these errors, and the error development trend are discussed in this review.