For mist sensing, temperature-humidity sensor is attached on six positions of front glass and rearview mirror in automobile. Bottom-left side of front glass is the best position where mist is sensing. For mist removal, air conditioner is turned on intensity 1, 3 and is set the temperature at 17[$^{circ}C$], 25[$^{circ}C$]. And heater is turned on intensity 1, 3 and is set the temperature at 25[$^{circ}C$], 32[$^{circ}C$]. The best condition which mist is removed is temperature at 17[$^{circ}C$] and intensity 3 of air conditioner mode. At this condition, total average value of humidity output voltage difference is 0.561[V]. Also, air conditioner mode is effective than heater mode for mist sensing and removal.