情報通信技術分野においても，省エネルギー対応は社会的な要請であり，それに応えるためには，サーバ機器などの消費電力や温度を適切に計測する必要がある．そこで，本稿では，サーバや UPS に内蔵されたセンサなどを活用した簡易計測手法を紹介する．また，簡易計測と，トレーサビリティをとれる測定機器との相関や誤差を報告する．さらに，JIS などの規格による定格と実際の測定結果との関係について述べる．It is inevitable to meet the social request of energy saving in information and communication technology. Therefore, it is very important to measure power consumption and temperature of IT equipments. Here, we will introduce a simple measurement method with built-in sensors in a server and a UPS. The correlation and the difference between the simple method and an accurate method with a traceable equipment is also reported. Finally, the relation between the rating of standards of JIS etc and the practical measurement results is described.