PROBLEM TO BE SOLVED: To solve the problems that the content of advertisement in a POP panel may not match the price displayed in an electronic shelf label when the electronic shelf label is incorporated in the POP panel, and wherein the mismatch is left intact till a staff of a shop in charge notices the mismatch.;SOLUTION: An electronic shelf label device 1 detects a panel identification part 33 of the POP panel 30 attached to the device, and transmits the information on the kind of the POP panel 30 to a host device 50. The host device 50 collates the information on the kind of the POP panel attached to the target electronic shelf label device 1 with the price attribute information stored in a present display state storage part 27 of a price data storage part 23. When the information does not match each other, the host device transmits error information to the electronic shelf label device 1. When the information on the kind of the POP panel matches the price attribute information, the host device transmits the price information to the electronic shelf label device 1.;COPYRIGHT: (C)2008,JPO&INPIT
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