A system and method for sharing multimedia broadcasting programs, which are applied among a plurality of PCs belonging to the same subnet. A wireless data terminal is configured in a first PC. When other PCs in the subnet want to share the multimedia broadcasting program with the first PC, they sending sharing requests to the first PC, and the first PC forwards the sharing requests to the wireless data terminal. After the wireless data terminal converts the multimedia broadcasting program to be in the format of streamlining media, it sends the program to the PCs initiating the sharing requests via the first PC. The multimedia broadcasting signal received through the wireless can be shared in a wired network.