The weather is very hot. Xiaohong is doing homework at home, sweating profusely. She looked up at the thermometer hanging on the wall. The room temperature was 32℃. So she turned on the electric fan.

Turning on the electric fan can only speed up the air flow, thus accelerating the evaporation of human sweat, which absorbs heat, so people feel cool, but it can't change the temperature of the air, so the pointer of the thermometer remains unchanged.

So the answer is: unchanged; The fan accelerates the evaporation of human sweat and takes away more heat to cool people down, but the ambient temperature has not changed.