A medical support control system according to one of aspects of the present invention has a plurality of video interface cards that are used for the medical support control system for converting, when a video signal is input from an external environment, a video signal input from the external environment into a common signal and vice versa, the common signal being different from any video signals input into and output from the plurality of video interface cards and the common signal being used commonly in the medical support control system, a switching control card for selecting, from among the video interface cards, a video interface card as an output destination in accordance with an instruction given from an external environment, and a plurality of video processing cards that are used for the medical support control system for processing the common signal into a video signal appropriate to the selected video interface card on the basis of a video signal expressed by the common signal.
