The operation control data about the component device constituting the synchrotron 13 are structured to include an initial acceleration control data item, a plural extraction control data items, a plural energy change control data items that connect the plural extraction control data items. The plural extraction control data items include extraction condition setting data items and extraction condition cancellation data items corresponding to the plural extraction control data items. As a result, a particle beam irradiation system capable of controlling changes in beam energy, updating operation cycle, and extracting beam in a short time can be provided.
