The invention discloses a clean energy system for a residential community and an operation method of the system, and mainly relates to the clean energy system. The system comprises a solar power generation module, an electricity utilization module, a pumped storage module, a phase modifier module and an intelligent control module, wherein the solar power generation module comprises a photovoltaicsolar cell panel and a photovoltaic inverter connected to the solar cell panel; the electricity utilization module is a three-phase alternating current circuit; the pumped storage module comprises anupper water tank which is arranged on the roof, a water pumping generator set and a lower water tank; and the phase modifier is a synchronous phase modifier. The system and the method have the beneficial effects that a height difference of a residential building is effectively utilized, and the electric energy is converted into the potential energy of water to be stored; the vertical surface, facing the sun, of the residential building is effectively utilized, the solar photovoltaic cell panel is installed, and the land area is saved; and the electric energy can be absorbed from a power distribution network through the pumped storage module and the phase modifier, so that the dispatching flexibility of a power grid is improved.