To further promote the construction of sponge cities, system dynamics and Morris, EFAST sensitivity analysis methods were used to analyze the regional differences in the benefits of sponge facilities in residential areas. The research conclusions are as follows: The comprehensive incremental cost benefit and economic, environmental, and incremental social benefits of Shenzhen, Beijing, Lanzhou sponge facilities in operation for 20 years accounted for 1 504.5 (69%, 23%, 8%), 352.4 (54%, 28%, 18%), and 2.0 (27%, 53%, 20%) ten thousand yuan, respectively. The sensitivity of the comprehensive benefit parameters of sponge facilities from high to low is sorted as average annual precipitation, rainwater recovery rate, economic loss caused by water shortage, etc. Among them, the rainfall and rainfall characteristics limit the benefit value of Beijing and Lanzhou. The low of water use in Lanzhou also affects the benefit value.