A household power supply system includes a power supply, a household energy management center, and a power fusion system. The power supply includes one or more power supply sources. The household energy management center includes an energy management system (EMS) module, a meter socket adapter (MSA), an electric meter inserted in the MSA, and a distribution hub. The MSA includes a connection port for connecting a load. The EMS is arranged for managing and scheduling the one or more power supply sources. The distribution hub is arranged for connecting or disconnecting the one or more power supply sources. The power fusion system is connected to the household energy management center and the power supply, respectively and includes a control unit and one or more power supply modules. The one or more power supply modules are arranged for converting AC power or DC power into required AC power.