Disclosed a live interaction system, an information sending method, an information receiving method and device, and belongs to the technical field of Internet. The system includes at least one client and an interaction platform. the client is configured to send to the interaction platform an interaction instruction for instructing the interaction platform to add an interaction prop into a live stream; and the interaction platform is configured to intercept an image frame from the current live stream, generate instant feedback information according to the image frame and the interaction prop indicated by the interaction instruction, and send the instant feedback information to the client.