A method of requesting a broadcast notification present disclosure includes steps of receiving, by a set-top box, a notification request signal for a broadcast and mobile terminal information, transmitting, by the set-top box, the notification request signal and the mobile terminal information to a data server, transmitting, by the data server, a product purchase guide message related to the broadcast to a mobile terminal, and transmitting, in response to the data server receiving a notification request detail request signal and the mobile terminal information from the set-top box, notification request signal information corresponding to the mobile terminal to the set-top box through a network.