A system for broadcasting additional information related to at least one poster present on a display panel, towards a mobile terminal, the system comprising: - an operating center including means for storing identification data relating to a plurality of display panels as well as, for each display panel, geographic position data of said display panel and identification data of the poster(s) presented on said display panel; and means for identifying and locating a display panel and for identifying the poster(s) presented on said display panel, from said identification data of said display panel derived from an identification element present on said display panel and received by a service center; - a service center including means for receiving identification data of said display panel, said identification data being derived from an identification element present on the display panel and communicated to the service center by a mobile terminal via a communication network (R'); means for storing additional information relating to a plurality of posters presented on said plurality of display panels and their geographic locations; means for retrieving additional stored information relating to said poster identified by said operating center and presented on said display panel identified by said operating center; and means for transmitting said additional information towards said mobile terminal via said communication network (R'); - the operating center and the service center being interconnected, the service center retrieving from the operating center said geographic position data of said display panel and said identification data of the poster presented on said display panel, so as to allow it to retrieve, in its storage means, said additional information relating to said identified poster presented on said identified display panel and relating to the geographic location of the display panel. - an operating center including means for storing identification data relating to a plurality of display panels as well as, for each display panel, geographic position data of said display panel and identification data of the poster(s) presented on said display panel; and means for identifying and locating a display panel and for identifying the poster(s) presented on said display panel, from said identification data of said display panel derived from an identification element present on said display panel and received by a service center; - a service center including means for receiving identification data of said display panel, said identification data being derived from an identification element present on the display panel and communicated to the service center by a mobile terminal via a communication network (R'); means for storing additional information relating to a plurality of posters presented on said plurality of display panels and their geographic locations; means for retrieving additional stored information relating to said poster identified by said operating center and presented on said display panel identified by said operating center; and means for transmitting said additional information towards said mobile terminal via said communication network (R'); - the operating center and the service center being interconnected, the service center retrieving from the operating center said geographic position data of said display panel and said identification data of the poster presented on said display panel, so as to allow it to retrieve, in its storage means, said additional information relating to said identified poster presented on said identified display panel and relating to the geographic location of the display panel.