The invention discloses a refrigeration and heating water cup for field mountain climbing. The water cup comprises a cup body, a cup lid arranged on the top of the cup body, a temperature adjusting base arranged at the bottom of the cup body, and a cup base detachably connected to the bottom of the temperature adjusting base; the cup body comprises a metal inner container, the bottom of the metalinner container is fixed to the interior of the temperature adjusting base, an installing table is arranged on the outer side of the upper end of the metal inner container, and a heat conducting layerand a heat insulating layer are arranged between the installing table and the temperature adjusting base; the heat insulating layer comprises a first outer shell and a second outer shell, the first outer shell and the second outer shell are combined to form an annular heat insulating layer, an annular sliding groove matched with the second outer shell is formed in the temperature adjusting base and the installing base, and the second outer shell can slide inside the annular sliding groove.