A commodity promotion system includes output unit that presents a customer with information, commodity presence/absence determination unit that determines presence or absence of the target article on the basis of signal strength information of the RF tag, commodity information storage unit that stores commodity information list in which the tag information of the RF tag, commodity presence/absence information indicating presence or absence of the target article, output unit ID information of the output unit, and output information indicating information to be presented are associated with one another, and commodity pickup determination unit that detects that the target article has changed from a presence state to an absence state, on the basis of a determination result of the presence or absence of the target article and the commodity presence/absence information in the commodity information list and outputs the output information associated with the tag information to the output unit.