Abstract: The invention relates to a method and system for providing a search service to a bidirectional broadcasting terminal during program broadcasting. The invention includes providing a search area for a search service on a screen of the broadcasting terminal in response to key input, providing a first search window to display a representative keyword automatically being as an input with a search word based on an identification of the program, providing a second search window adjacent to the first search window to display a program-related search word automatically being as an input with a completion form of a search word, and providing a third search window adjacent to at least one of the first or second search windows and to display a real-time hot-topic search word automatically being as an input. The second and third search windows to provide an extended pop-up window including a modified word of the search word displayed on the respective search window in response to a selection by a user.