Abstract:Abstract: This paper's motive is to advance the service level of weather and hydrology business. From the actual characteristics of weather and hydrology business, it puts forward tradition problems of weather and hydrology business. Combining the characteristics and advantage of cloud calculation technique, it brings forward several application solutions of cloud calculation technique playing at weather and hydrology business, also analyses the problems and difficulties that may be faced with, and gives constructive opinions. It provides instruction function for cloud calculation in the weather and hydrology business development.