Abstract: Demand side resources (DSR), including the distributed power generation, have gradually become an indispensable part of the power system. The virtual power plant (VPP) can effectively integrate all kinds of DSRs, and give full play to its great potential in the power auxiliary service. The efficient and reliable operation of the VPP and the internal flexible interaction between the different subjects rely on the advanced information and communication infrastructure. Starting from the basic concept and the characteristics of the VPP and the practical cases at home and abroad, the basic communication architecture and the performance requirements of the VPP are analyzed. Then, several key technologies of the information communication supporting the flexible interaction of the VPP are discussed. In addition, its applications in the future VPP are also considered, the purpose of which is to provide solutions for improving the flexible interaction level of the VPP and maximizing the advantages of the DSR resources.