In the evaluation of stormwater management performance of landscape architecture project, the data acquired efficiently in real time is the basis of quantitative evaluation. The intelligent monitoring system of stormwater management based on the Internet of Things and wireless sensor networks has provided a new technical approach for real-time acquisition of performance data, performance evaluation and post-management of the project. In this paper, a framework for the intelligent monitoring system of stormwater management based on the Internet of Things and wireless sensor networks was introduced. The system structure and basic operation mode were described through an eco-road project case in Nanjing, China. The project team implemented the monitoring of the basic data of the rainfall, surface runoff, rainwater collection, soil moisture content, etc. by constructing the intelligent monitoring system of stormwater management for the project, and conducted quantitative analysis and evaluation on the stormwater management performance of the project based on the monitoring data in the last 3 years.