Abstract: A circuit-switch streaming service (CSS) system includes a circuit-switch streaming service center (CSSC), and a video interworking gateway (VIG). The system also includes an application server (AS), and the AS is connected to the CSSC for initiating a video call command to the CSSC; the CSSC identifies the video call command initiated by the AS, establishes the connection with the called terminal through the gateway based on the command, and transmits the streaming content specified by the AS to the called terminal. The invention also provides a corresponding realization method of the CSS. According to the CSS, the service of initiatively transmitting the streaming content for users can be realized and a good way for developing various video services by the operators is provided.