Disclosed herein is an interactive broadcasting system. The interactive broadcasting system includes a web server, a content providing server, a streaming server, a broadcast control server, and a content control server. The web server provides a web page through the Internet and controls a web connection. The content providing server provides content. The streaming server streams the content to the mobile terminal, and receives messages transmitted from the mobile terminal. The broadcast control server manages the broadcast schedule of the content and generates details of the picture construction. The content control server generates a picture depending on the details of a picture construction, and performs picture combination by overlaying the generated picture on a content picture provided by the content providing server, and transmits the combined picture to the streaming server, thus allowing the combined picture to be streamed to the mobile terminal by the streaming server.