The HEMS (Home Energy Management System) App has rich application functions, covering the entire life cycle of plant and device. With the popularization of solar PV, energy storage systems and electric vehicles (EVs), distributed energy has gradually become an important part of the home energy system. More and more families are achieving energy self-sufficiency or participating in the energy trading market by installing PV panels and energy storage batteries. The main function of HEMS is to optimize household energy consumption, reduce grid pressure and create additional revenue through intelligent scheduling of these energy resources. Therefore, as the scale of distributed energy continues to expand in the future, the demand for HEMS will also grow rapidly and become a key tool for home energy management.