New generation Doppler weather radar (NEXTRAD) has become one of the most important tools for monitoring and forecasting severe weather. It has been widely used in some developed countries. China's NEXTRAD network has been constructed since 1998, and the project is supported by national debt. The techniques in NEXTRAD development are described in this article, including the situation of construction and application in China, some problems that should be carefully considered in construction and several new fields of radar techniques in weather monitoring in future.