A management server stores administrator setting information for managing an expanded rental mode for each battery station based on specification by an administrator, controls, by referring to the administrator setting information, switching between the expanded rental mode and a normal rental mode which permits rental of only fully charged battery devices at each battery station, and displays a station guidance screen on a user terminal, the station guidance screen providing the user with guidance on the battery stations based on control of the rental mode thereof and including information on a transition state to the expanded rental mode at each battery station.