PROBLEM TO BE SOLVED: To provide a medical image management system capable of shortening reading time of medical picture data and method therefor.SOLUTION: A system comprises: means for storing priority of medical image data sharable with a plurality of servers means for distinguishing a server in which the medical image data should be stored based on the priority of the medical image data and means for distributedly storing the medical image data in the server in which the medical image data should be stored based on the distinguished result.