The present invention can cope with both localized treatment and large-scale invasive surgery and reduces operating time. Provided is a medical system (1) comprising: a first robot arm (3) provided with a first manipulator (12) including a first treatment section (15) and with a first imaging unit (14) having a field of view that includes a movable range of the first treatment section (15)； a second imaging unit (10) having a field of view that is wider than said field of view； a display unit (20) that displays video from the first or second imaging unit (10, 14)； a switching unit (22) that switches the video； an operation unit (6) for inputting operation command for the first manipulator (12) and the first robot arm (3)； and a control unit (7) that controls the first manipulator (12) and the first robot arm (3) on the basis of the operation command. The control unit (7) controls the first robot arm (3) and the first manipulator (12) according to the operation command when the video is switched to that from the second imaging unit (10), and controls the first manipulator (12) according to the operation command when the video is switched to that from the first imaging unit (14) .
