Abstract: To achieve the goal of "carbon peak and carbon neutrality", carbon dioxide emission of seaport integrated energy system is reduced by full-electrification for sustainable development. However, multi-energy flow integration poses critical challenges to seaport integrated energy systems on optimal planning and operation. First, this paper summarizes the low-carbon economic development of seaport integrated energy system based on energy and emission policy. Then, the characteristics of the seaport integrated energy system are analyzed from energy side, load side and energy storage side. Furthermore, the key technologies of energy trading, carbon capture, utilization and storage, optimized configuration of energy storage system and multi-energy complementary collaborative optimization to promote the low-carbon emission reduction of seaports are investigated. Finally, the essential problems and future study of low-carbon economy development for seaport microgrid based on energy storage system is prospected.