Provided are a method for accurately measuring the content of a blood component of a human body by using a non-invasive means and by means of the rate of a blood component of a human body absorbing infrared light at a specific frequency, and a device therefor with a simple structure. The method comprises the following steps: selecting a part to be measured (S101)； performing temperature adjustment on the part to be measured (S102)； using an infrared light detection signal to irradiate the part to be measured (S103)； acquiring a feedback signal (S104)； and when the part to be measured is at at least two different temperatures, respectively acquiring the feedback signal at the corresponding temperature, and obtaining, through calculation, the content of a component to be measured in blood (S105). The measuring device comprises a main control circuit (1), a signal generator (2), a positioning device (5), a signal receiver (8) and a temperature adjustment device (3). The method for measuring the content of a blood component of a human body provides medical researchers with a new idea of accurately acquiring the content of a blood component of a human body by means of non-invasive detection, and in particular research on the infrared multi-spectral characteristics of a biomarker of a cancer. The measuring device can prevent invasive detection from causing physical and psychological pain to patients and the risk of contracting diseases.L'invention concerne un procédé de mesure précise du contenu d'un composant sanguin d'un corps humain à l'aide d'un moyen non invasif et au moyen de la vitesse d'un composant sanguin d'un corps humain absorbant la lumière infrarouge à une fréquence spécifique, et un dispositif associé ayant une structure simple. Le procédé comprend les étapes suivantes consistant à : sélectionner une partie à mesurer (S101)； effectuer un réglage de température sur la partie à mesurer (S102)； utiliser un signal de détection de lumière infrarouge pour irradie
