To provide a medical image system which allows even inexperienced users to operate it efficiently, and a display method therefor.

In the medical image system 1 which covers the taking, processing, printing and reading processing, or the like, of medical images, detailed information pertaining to operation keys to be displayed on a display part 12 is stored into a memory part 15 as detailed information data and the detailed information data of the operation key as indicated are obtained from the memory part 15 in response to directions made by the operations of users and the detailed information pertaining to the operation key is shown on the display part 12.