The invention relates to a demand response service data packet transmission method and a scheduling system. The method comprises the following steps: sending a received demand response service data packet to the tail of a corresponding queue; updating scheduling parameters of the scheduling system; calculating the transmission time of transmitting the demand response service data packet to the head of the corresponding queue based on the updated system scheduling parameter; and selecting the demand response service data packet with the minimum transmission time from all queues for forwarding.According to the technical scheme provided by the invention, the scheduling algorithm is improved by setting the dynamic weight. Therefore, the scheduling system effectively reduces the transmission delay and the packet loss rate of the demand response service while meeting the QoS performance of the demand response service. As a result, the reliability and real-time performance of data transmission of the scheduling system are improved, and the service quality of the scheduling system is improved.