Abstract:The characteristics of water vapor, liquid water content, humidity and cloud base height in the north and south of Qinling Mountains are analyzed by using microwave radiometer. The results show that the annual average of vertically integrated water vapor in the north of Qinling Mountains is 18.52 kg·m-2, and that in the south of Qinling Mountains is 20.94 kg·m-2. The average height of more than 90% water vapor in the north of Qinling Mountains is 4.26 km, and that in the south of Qinling Mountains is 3.87 km. The average annual water content of vertical integrated liquid water content is 0.13 kg·m-2 in the south of Qinling Mountains and 0.12 kg·m-2 in the north of Qinling Mountains. The air humidity in the hinterland of Qinling Mountains is high. The annual average relative humidity in the south of Qinling Mountains is 75.3%, and that in the north of Qinling Mountains is 59.8%. The average relative humidity in the south of Qinling Mountains is 15.6% higher than that in the north of Qinling Mountains. The average height of cloud base is 3 〖KG-*5〗817.5 m in the south of Qinling Mountains and 4 〖KG-*5〗396 m in the north of Qinling Mountains. The annual average height of cloud base in the south of Qinling Mountains is 323.3 m, which is 42.2 m lower than that in the north of Qinling Mountains.