A radiation imaging system for imaging an object to obtain a radiation image based on an imaging protocol, the system comprising: a storage unit configured to store a radiation image, with image information indicating an attribute of the radiation image being added thereto a copying unit configured to, upon receiving an instruction to copy a radiation image stored in the storage unit, copy the radiation image and image information added to the radiation image and a changing unit configured to change an item, of items included in copied image information copied by the copying unit, which is unique to each of radiation images and different from each other, in accordance with a copied image, thereby changing the copied image information.
