Disclosed is AI digital signage technique capable of improving a purchase effect of advertisement. According to one embodiment of the present invention, a digital signage system may comprise the steps of: receiving that code information provided while content is outputted to an electronic display is scanned using an electronic device; connecting a chatbot for performing at least one interaction related to the content through a connected instance message service as the received code information is identified; and providing interaction information for performing at least one interaction related to the content to the electronic device through the connected chatbot.;COPYRIGHT KIPO 2020
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