Intelligent water storage and drainage-irrigation integrated roof greening energy-saving system and method

The invention discloses an intelligent water storage and drainage-irrigation integrated roof greening energy-saving system and method, and belongs to the technical field of roof greening. The intelligent water storage and drainage-irrigation integrated roof greening energy-saving system comprises a planting module, a water storage and drainage module and an irrigation module which are modularized and detachably assembled; the bottom of the planting module is communicated with the top of the water storage and drainage module; the irrigation module comprises a water tank communicated with the water storage and drainage module, a sprinkling irrigation mechanism which is communicated with the water tank and is positioned above the planting module, and a plurality of soil moisture sensors which are uniformly embedded in the planting module and are electrically connected with the sprinkling irrigation mechanism; the water tank is provided with a solar photovoltaic mechanism used for providing electric energy for th