PROBLEM TO BE SOLVED: To surely verify the irradiation of a particle beam by a selected irradiation method. SOLUTION: A particle beam therapy system 100 includes a charged particle beam generator 200 for accelerating a particle beam, an irradiation device 500 for irradiating a target with a particle beam accelerated by the charged particle beam generator 200, and a charged particle beam generator. It has a device 200 and a control device 600 for controlling the irradiation device 500, and the control device 600 has a charged particle beam generator 200 and an irradiation device 500 so as to switch at least two different irradiation methods to irradiate a target with a particle beam. After switching the irradiation method, the particle beam is experimentally irradiated by the charged particle beam generator 200 and the irradiation device 500 by the switched irradiation method to verify the particle beam. [Selection diagram] Fig. 1【課題】選択した照射方式による粒子線の照射を確実に検証することを可能にする。【解決手段】粒子線治療システム１００は、粒子線を加速する荷電粒子ビーム発生装置２００と、荷電粒子ビーム発生装置２００で加速された粒子線を標的に照射する照射装置５００と、荷電粒子ビーム発生装置２００及び照射装置５００を制御する制御装置６００とを有し、制御装置６００は、少なくとも２つの異なる照射方式を切り替えて粒子線を標的に照射させるように荷電粒子ビーム発生装置２００及び照射装置５００を制御し、さらに、照射方式を切り替えた後に、切り替えた照射方式により荷電粒子ビーム発生装置２００及び照射装置５００により粒子線を試験的に照射させてこの粒子線を検証する。【選択図】 図１
