Digital Broadcasting System for picture of channel loading and Method of that

A digital broadcasting system for providing a channel switching screen and a method thereof are provided to have no need to allocate an additional band by transmitting the channel switching screen through the idle band of a broadcasting channel, perform public relations according to the event and commercial plan of a service provider through various channel switching screens, and strengthen customer royalty by inserting an advertisement for a tedious channel loading time, thereby improving the economical efficiency and the PR effects of various events and broadcast programs, and creating a new business model. A digital broadcasting system for providing a channel switching screen comprises a storage unit(303), a data broadcasting server(304), and a PSI/SI(Program Specific Information/Service Information) server(306). The storage unit stores the channel switching screen. The data broadcasting server reads the channel switching screen from the data broadcasting server and outputs the read channel switching screen and file information about the channel switching screen. The PSI/SI server receives the file information about the channel switching screen from the data broadcasting server and outputs a PSI table and an SI table according to the file information about the received channel switching screen. The channel switching screen and the file information about the channel switching screen are transmitted by using the idle band of a broadcasting channel.