本文介绍了利用极轨气象卫星ＮＯＡＡ／ＡＶＨＲＲ资料遥感监测土壤水分的表观热惯量方法及其原理。同时对土壤含水量与土壤表观热惯量分级之间进行了相关分析，发现二者之间存在显著的正相关关系，并通过回归分析，初步建立了二者关系的数学模型。基于上述数学模型和土壤表观热惯量数字图象，可以生成土壤水分等级图 This paper introduces the method and principle of monitoring the apparent thermal inertia of soil moisture by using polar orbit meteorological satellite NOAA / AVHRR data. At the same time, the correlation analysis between soil water content and soil thermal inertia grading was carried out, and found that there was a significant positive correlation between the two, and the mathematical model of the relationship between the two was established through regression analysis. Based on the above mathematical model and the soil apparent thermal inertia digital image, a soil water level map