Abstract: [Problem] The present invention is intended to provide a digital signage system which can measure depth of interest of customers and can perform sales promotion to the customers. [Method of settlement] The digital signage system of the present invention can measure depth of interest of customers, by which a database 22 memorizes an amount of time during which the customers have taken out a clothes hanger from a hanger tack and a time update section 24 updates this and accumulates them. Willingness of the customers to buy can be increased by analyzing clothing information which the customers have picked up and by displaying an image with respect to the clothing article on a monitor in the vicinity of the customers.