The development of multi-energy complement is bound to facilitate the formation and optimization of diversified virtual power plant (VPP) positively, further highlighting the role of VPP in the grid operation and electricity market. To this end, the concept and characteristics of VPP with multi-energy complement VPP are summarized, and the differences with micro grid and demand response are deeply discussed. The structure and key technologies of VPP participating in power market under multi-energy complementary technology are discussed from the perspectives of regulation and trade emphatically, providing guidance for the construction and application of VPP in the future.