Abstract: The present invention provides a smart power supply system including an open storage chamber, a rail, and photovoltaic umbrellas each including a plurality of photovoltaic umbrella panels. The photovoltaic umbrellas may be stored in the storage chamber; the storage chamber is connected to the rail via an opening. When in use, the photovoltaic umbrellas are moved upward from the storage chamber to the rail, then photovoltaic umbrella panels of the photovoltaic umbrellas are expanded. During storage, the photovoltaic umbrella panels of the photovoltaic umbrellas are collapsed, then the photovoltaic umbrellas move downwards along the rail and are then stored in the storage chamber. In the present invention, when use of the photovoltaic umbrellas is required, the photovoltaic umbrellas are expanded outdoor; under certain circumstances such as raining and typhoon, the photovoltaic umbrellas are stored indoor to prevent damages caused to the photovoltaic umbrellas.