This paper report refers to an indoor thermal environment and energy-saving characteristics of asmall-scale nursing home in CHINO City, Nagano Prefecture, JAPAN (referred to as S nursing house)by means of measuring the temperature, humidity and electricity consumption. The city of CHINO, avery cold area in Japan, is allocated to Area II under the new energy-saving standard in Japan. Thishouse is built with the EWIS for reinforced concrete structure. To ensure higher thermal insulationperformance, the EPS boards with thickness of 300 mm are attached onto the wall building fromoutside.