An ESL server (3) includes a management-device storage unit for storing information indicating a position at which a second electronic shelf label terminal (1) is installed, a management-device reception unit for receiving information transmitted from a transmission unit of a handy terminal (5), and a management-device control unit for identifying a position at which a first electronic shelf label terminal (1) is installed based on information for uniquely identifying the first electronic shelf label terminal (1), information for uniquely identifying the second electronic shelf label terminal (1), information indicating relative position between the position at which the second electronic shelf label terminal (1) is installed and the position at which the first electronic shelf label terminal (1) is installed, and the information indicating the position at which the second electronic shelf label terminal (1) is installed.