The invention relates to a vacuum cup capable of cooling and heating instantly, which is convenient in use, wherein air-cooling and air-heating speed of drinking water in the cup can be regulated in a stepless manner. The vacuum cup capable of cooling and heating instantly comprises a cup body and a cup cover, the cup body comprises an inner layer, a shell and a gap layer, the gap layer is arranged outside the inner layer and inside the shell, a bottom hole is arranged at the bottom of the cup body and is communicated with the bottom of the gap layer, an upper hole is arranged at a high position of the shell and is communicated with a high position of the gap layer, a ventilating notch or an air vent is arranged on a skirt, which is lower than the bottom hole, of the shell, the shell is provided with a concave bottom, the bottom hole is arranged on the concave bottom of the shell and provided with a bottom hole cover or a bottom hole switch, and the upper hole is provided with an upper hole switch. The vacuum cup can realize air cooling and air heating for the drinking water in the cup, the air-cooling or air-heating speed of the drinking water in the cup can be regulated in the stepless manner, the drinking water in the cup can be in water cooling or water heating rapidly, a thirsty person can drink the drinking water at the proper temperature rapidly, and furthermore, the vacuum cup can brew good tea and heat milk, and is convenient in use.