A medical system 1 includes a light source apparatus 16 configured to supply a light source for obtaining an endoscopic image 51 into a body cavity, an operating field monitor 3 configured to display the endoscopic image 51, and a system controller 21 configured to control a plurality of controlled apparatuses. The system controller 21 includes a discriminating section 40 configured to discriminate whether the endoscopic image 51 is displayed on the operating field monitor 3 and a control section 36 configured to perform control to display, when the endoscopic image 51 is displayed on the operating field monitor 3, a voice operation main screen 52 for instructing operation of the controlled apparatuses and the endoscopic image 51 on the operating field monitor 3 and display, when the endoscopic image 51 is not displayed on the operating field monitor 3, a voice operation screen 54 for performing a check of operation states of the controlled apparatuses and an operation instruction of the controlled apparatuses on the operating field monitor 3.
