Interconnected river system network as a national water conservancy strategy was put forward in the new period,and its connotation and theory have become a hot topic in scientific research.The purpose of this paper is to review the connotations of river-lake relationship and interconnected river system network and to investigate the key impact factors for the evolution of interconnected river system network.The interconnected river system network belongs to the river-lake relationship,and it is an important content of the research on the relationship between rivers and lakes.The evolution of interconnected river system network is mainly affected by the geological and geomorphological conditions,climate change,water and sediment inputs from other watershed,lake evolution,and human activities.In addition,the correct understanding of river-lake relationship is the premise and foundation of the interconnected river system network project.The related theories of river-lake relationship are the theoretical basis to build the interconnected river system network project and to guide the construction of interconnected river system network project directly.