To provide a medical system that is easy to confirm a display screen and easy to switch an image. A medical camera 2 is connected to a first input terminal 14a of a switching device 6. A medical image output device 4 for outputting a medical image is connected to a second input terminal 14b. An HMD 10 mounted on a face of a user is connected to a first output terminal 16a. An external monitor 12 is connected to a second output terminal 16b. Initially, a medical image from the medical image output device 4 is output and displayed on the HMD 10. A camera image from the medical camera 2 is output and displayed on the external monitor 12. When a control switch 66 is operated, images displayed on the HMD 10 and the external monitor 12 may be switched.
