A lesion identification information acquisition unit acquires lesion identification information including the result of identifying a lesion confirmed in a current endoscopy of a patient being examined. An examination history information acquisition unit acquires examination history information including a diagnosis history for a past endoscopic examination of the patient being examined. A recommended action information output unit compares the lesion identification information and the examination history information with a prescribed determination criterion (created on the basis of, e.g., accumulated data from past endoscopic examinations) and outputs recommended action information including a recommended action for the lesion confirmed in the current endoscopic examination.