Disclosed is a method for evaluating an irradiation angle of a beam, including a step of sampling the irradiation angle of the beam, wherein the irradiation angle of the beam is defined as being the direction of the vector of the irradiation point of the beam to the pre-set point of the tumor； and a step of calculating the track of the beam passing through the organs, wherein it is determined whether the tumor is fully covered within the effective treatment depth, and if so, entering the steps of calculating the evaluation coefficient, recording the irradiation conditions and calculating the results, and returning to the step of sampling the irradiation angle of the beam； and if not, entering the step of giving the worst evaluation coefficient and returning to the step of sampling the irradiation angle of the beam. According to the method for evaluating the irradiation angle of the beam, it can be clearly recognized whether the performance of the beam irradiating at a certain position and at a certain angle is good or bad, thus providing strong data support to allow doctors or physicists to decide on the irradiation mode.一種射束的照射角度評價方法，包括：對射束的照射角度進行取樣的步驟，其中，所述射束的照射角度定義為射束的照射點至腫瘤預設點的向量方向；計算射束通過器官徑跡的步驟；判斷腫瘤是否充分涵蓋於有效治療深度內：如果是，則進入計算評價因數、記錄照射條件及計算結果的步驟並返回對射束的照射角度進行取樣的步驟；如果否，則進入給予最差評價因數的步驟並返回對射束的照射角度進行取樣的步驟。根據此射束的照射角度評價方法，可以清楚地認識到射束在某一特定位置和某一特定角度照射時的優劣表現，從而為醫生或物理師決定照射模式提供強有力的資料支援。
