This invention provides a monitoring system (10) including a detection unit (11) that detects that a detection value relating to a power storage system satisfies a condition; an identification unit (12) that identifies a type of fault occurring in the power storage system in accordance with the detection of the detection unit (11); and a decision unit (13) that decides an operation continuable time of the power storage system after the type of fault is identified, on the basis of the type of fault.