Abstract:Informatization construction of river chief system is necessary and important for carrying out river and lake chief system. Based on the current situation of river chief system informatization construction, this article analyses 10 existing problems, puts forward the big data content for river and lake management, discusses the importance and the instructions of implementing the smart river chief system, and offers suggestions on how to improve river and lake chief system informatization by big data technology with several examples, which have reference values for informatization of river chief system.