In this paper, the North-west Pacific Cloud-Radiation Experiment program is cletailedly described. The first experiment at Shionomissald, Japan, Feb.-Mar. of 1989 is discussed. A new dual - channal (λ = 8rnm-1.35cm) microwave radiometer, developed by B.eijing University, has been used in field experiments for remote-sensing of the atmospheric- water vapor content, liquid water content in a cloud and liquid water content distribution of the total clouds over the sky. The rain process of clouds is studied, too.