The invention relates to the field of liquor storage, in particular to a domestic underground constant temperature wine cellar, including a ground device, a cellar passageway and wine storage rooms. The cellar passageway is arranged at the bottom of the ground structure, the cross-section of the cellar passage is circular, the cellar passageway extends through the top of the wine storage chamber to the bottom of the wine storage chamber, The shape of the wine storage room is round, The wine storage room comprises a ceiling, a circular wall and a circular floor, wherein the ceiling is inclineddownward by 5-10 degrees along the wine cellar passage in the middle; a fan is installed on the top of the ceiling near the wine cellar passage; a ventilator is arranged on the side of the wine cellarpassage near the fan air outlet; the ceiling is connected with the circular floor through the circular wall; and a wine rack is arranged on the top of the circular floor. The invention maintains thedryness of the wine cellar by inclining the ceiling downward by 5-10 degrees along the central wine cellar passage, adding a fan and a door plate provided with air holes which are favorable for dissipating excess moisture, and the dryness of the wine cellar is maintained. The unique wine shelves facilitate the storage of large quantities of bottled wine, suitable for domestic use.