To provide a method, a system, and a program for taking radiation images capable of accurately matching a patient to a radiation image detector even if the radiation image detector is selected just before the radiography to be adjusted to the body size of the patient as the subject of the radiography.

In the method for taking radiation images, a radiation image of the patient taken by the radiography is detected by a radiation image detector, and the information on the radiation image from the radiation image detector is received by a control device. The method for taking radiation images comprises a step S01 for inputting patient information, a step S03 for selecting the patient as the subject of the radiography, a step S08 for generating the radiation image by the radiation image detector after taking the radiation image of the patient and transmitting the generated radiation image to the control device, and a step S09 for matching the radiation image received in the control device to the patient information on the selected patient.