The data efficiency of medical image management system is improved. PACS (1) comprises server (2), viewer (3) and console (4) all connected to network (N). The console (4) controls the photographing operation of modality (5) and transmits status information indicating the status of progress status of the photographing operation to the server (2). Accordingly, not only the control of the photographing operation of modality (5) but also the reproduction and display of medical image data and memory management thereof can be carried out on the PACS (1) side, so that failures, such as data generation for compensating for any variance of work flow and generation of useless communication data within the PACS (1), can be avoided.