A real-time broadcasting contents transmission method and device are disclosed. In an embodiment, the device stores a streaming list which is information about one or more streaming contents received from a contents providing server. When a request being transmitted to the contents providing server is received from a terminal device through the communication unit, the device determines whether the requested streaming content is registered in the streaming list. If the requested streaming content is registered in the streaming list, the device branches the streaming content received from the contents providing server and then, after delay for a predetermined time, transmits the streaming content to the terminal device.