  Daisy (Data Analysis Integrated Software System) has been designed for the
analysis and visualization of the X-ray experiments. To address an extensive
range of Chinese radiation facilities community's requirements from purely
algorithmic problems to scientific computing infrastructure, Daisy sets up a
cloud-native platform to support on-site data analysis services with fast
feedback and interaction. The plugs-in based application is convenient to
process the expected high throughput data flow in parallel at next-generation
facilities such as the High Energy Photon Source (HEPS). The objectives,
functionality and architecture of Daisy are described in this article.
