PROBLEM TO BE SOLVED: To provide an operation support system capable of simplifying usage preparation work including the choice of an operation guide language of a defibrillator.SOLUTION: The operation support system is used to support the operations of a defibrillator such as an AED (automated external defibrillator). This defibrillator has a body, a case for housing the body, and a lid formed to be openable/closable on the case. A guide section of the operation support system chooses either a voice output for the operation guide of the defibrillator or a language of information to be displayed on the basis of a way of opening the lid.
