A method and a device for sending and playing the streaming data are disclosed in embodiments of the present invention. The method for playing the streaming data includes: receiving the streaming data from the client and buffering the data; and exporting the buffered streaming data according to the predefined rhythm. The statistics about the streaming data in the buffer is collected; and the rhythm is adjusted according to the amount of streaming data. The transmitting end can send the streaming data to the client as soon as possible and buffer only a little data; the client controls the rhythm to reduce the effect of network jitter on delay, thus shortening the delay of streaming play.