A medical system comprising: a control part configured to receive pathological image data that is produced by imaging one observation target object and that includes first and second image data, the second image data relating to the observation target object but being different to the first image data, a display control part that causes a displaying part to display thereon the first image data and the second image data; and an annotation processing part that applies an annotation to each of the first image data and the second image data on a basis of inputting by a user.