A streaming broadcast sponsorship system using an Internet of Things device, capable of inducing a viewer's sponsorship by enabling control of a broadcaster-owned Internet of Things device when the viewer's sponsorship is available is provided, the streaming broadcast sponsorship system includes a broadcaster terminal configured to generate a content and perform a streaming broadcast, a viewer terminal configured to be capable of viewing the broadcast, a server configured to receive the content from the broadcaster terminal, and transmit the received content to the viewer terminal, and IoT devices configured to be capable of communicating with the server and operated by the server, in which the viewer terminal generates sponsorship information for the broadcaster and transmit the sponsorship information to the server, and the server transmits a control signal corresponding to the sponsorship information to the IoT devices, and the IoT devices are operated by the control signal.