Abstract: Disclosed is a method for providing an interactive advertisement and detailed information, which including: (a) converting a secondary information tag, which is used for calling secondary information relating to data broadcasting, into data broadcasting contents according to data broadcasting protocols? (b) inserting the secondary information tag converted in step (a) into a data broadcasting area of a digital broadcasting stream; (c) transmitting the digital broadcasting stream including the secondary information tag, thereby allowing the digital broadcasting stream to be received in a digital broadcast receiver or a personal computer; and (d) when a request for the secondary information is received from the digital broadcast receiver or the personal computer, transmitting the secondary information from a secondary information server to the digital broadcast receiver or the personal computer connected to a communication network.