Verification tests and numerical simulations were conducted in order to investigate the effect of misting technology on energy saving in apartment housing. An apartment house was used as the verification test building in an investigation of the energy consumption reduction effect of three types of evaporative cooling techniques: "Rooftop spraying", "Veranda spraying" and "Spraying to the outdoor unit of room air conditioner". "Rooftop spraying" was intended to improve the thermal environment of the top floor by spraying water droplets onto the roof surface. "Veranda spraying" was spraying a fine mist of water droplets from the veranda such that cooled outside air would enter the room using the natural draft. "Spraying to the outdoor unit of room air conditioner" was spraying water droplets in the air inlet of an outdoor unit, thereby lowering the temperature of supply air and heat exchange fins and thus improving airconditioning efficiency. We confirmed that mist cooling techniques had the effect of reducing air-conditioning usage time, improving air-conditioning efficiency and reducing the energy needed for air-cooling. Numerical simulations also confirmed that the introduction of these measures had the effect of cutting energy consumption for air-cooling by over 80%.