The construction of sponge city has become an important way to coordinate the balance between human development and natural ecological environment. Therefore, the research on the coupling planning of the coastal sponge city in the framework of Pressure-State-Impact-Respond (PSIR) was put forward. On the basis of detailed analysis of the characteristics of sponge city and PSIR framework, a whole set of coastal sponge city matrix coupled planning index system was put forward. With the information technology used as the main technical means to monitor, the researchers analyze and evaluate the system. Finally, the system was illustrated and analyzed with Xiamen city, Fujian province as an example.