A method includes: sending a Real-time Transport Protocol data packet to a client; receiving a bandwidth value and a frame rate value fed back by the client, the bandwidth value and the frame rate value being calculated by parsing the data packet; obtaining a corresponding bandwidth weight according to the bandwidth value, and obtaining a corresponding frame rate weight according to the frame rate value; obtaining a quantization table weight according to the bandwidth weight and the frame rate weight; and matching image transmission data according to the quantization table weight; ands ending matched image data to the client.