The utility model discloses an electric power storage and energy storage device with stable heat dissipation for a photovoltaic microgrid. The device comprises a battery box, a cover body and a storage battery, the storage battery is arranged in the battery box; the cover body is hinged to the side wall of the top end of the battery box; the side wall of the battery box is hollow and forms a cavity; a plurality of air holes are uniformly formed in the inner side wall of the battery box; an air inlet pipe is arranged on the outer side wall of the battery box; the air hole and the air inlet pipeare communicated with the chamber; the air inlet pipe is connected with an air pump through a hose, the air pump is sleeved with a protective shell, the protective shell is fixed to the outer side wall of the battery box, a through hole is formed in the protective shell and provided with a filter layer, a limiting frame is horizontally arranged on the inner bottom wall of the battery box, the storage battery is located in the limiting frame, a breathable cushion layer is fixed to the bottom end of the cover, and a heat dissipation window is arranged on the cover. According to the utility model, uniform and stable heat dissipation can be carried out on the storage battery, and the use effect is good.