A radiation image photographing system, comprising: a plurality of controllers including: a receiving means configured to receive an image data set corresponding to a radiation image, an input section (22, 23, 24) configured to input an operator ID number, to discriminate an operator, radiographing information including reading sensitivity or reading resolving power of a radiation image reading apparatus, and a controller ID number, to discriminate a first controller of the plurality of controllers; a displaying means configured to display the received image data set, a storing means configured to store the operator ID number, the radiographing information and the image data set, and a registering means configured to register the operator ID number, a plurality of radiation image reading apparatus to read radiation image data by using a detecting means to detect X-rays and to output the image data set, the radiation image reading apparatus reading the radiation mage data using the reading sensitivity or reading resolving power input to the controller; and a transmitting means configured to transmit said operator ID number, said radiographing information and said controller ID number from any of the controllers of the plurality of controllers to all of the plurality of radiation image reading apparatus; transmit the image data set from one of the radiation image reading apparatus to the first controller; and when the transmission of the image data set to said first controller fails, to transmit the image data set from said one radiation image reading apparatus to a second controller of said plurality of controllers, when said operator ID number is registered with the second controller. a plurality of controllers including: a receiving means configured to receive an image data set corresponding to a radiation image, an input section (22, 23, 24) configured to input an operator ID number, to discriminate an operator, radiographing information including reading sensitivity or reading resolving power of a radiation image reading apparatus, and a controller ID number, to discriminate a first controller of the plurality of controllers; a displaying means configured to display the received image data set, a storing means configured to store the operator ID number, the radiographing information and the image data set, and a registering means configured to register the operator ID number, a receiving means configured to receive an image data set corresponding to a radiation image, an input section (22, 23, 24) configured to input an operator ID number, to discriminate an operator, radiographing information including reading sensitivity or reading resolving power of a radiation image reading apparatus, and a controller ID number, to discriminate a first controller of the plurality of controllers; a displaying means configured to display the received image data set, a storing means configured to store the operator ID number, the radiographing information and the image data set, and a registering means configured to register the operator ID number, a plurality of radiation image reading apparatus to read radiation image data by using a detecting means to detect X-rays and to output the image data set, the radiation image reading apparatus reading the radiation mage data using the reading sensitivity or reading resolving power input to the controller; and a transmitting means configured to transmit said operator ID number, said radiographing information and said controller ID number from any of the controllers of the plurality of controllers to all of the plurality of radiation image reading apparatus; transmit the image data set from one of the radiation image reading apparatus to the first controller; and when the transmission of the image data set to said first controller fails, to transmit the image data set from said one radiation image reading apparatus to a second controller of said plurality of controllers, when said operator ID number is registered with the second controller. transmit said operator ID number, said radiographing information and said controller ID number from any of the controllers of the plurality of controllers to all of the plurality of radiation image reading apparatus; transmit the image data set from one of the radiation image reading apparatus to the first controller; and when the transmission of the image data set to said first controller fails, to transmit the image data set from said one radiation image reading apparatus to a second controller of said plurality of controllers, when said operator ID number is registered with the second controller.