Factory Staging Project is very important part of openSUSE Factory development model now, it's a gate to make sure new packages update/change will not break openSUSE Factory totally and we can safety to release newer openSUSE Tumbleweed snapshot. I'll introduce how to Factory Staging Project work in this talk, including the workflow, the tools behind of Staging Project and the client-side tool we are used to. This talk should give openSUSE developers a clear picture about how Staging Master(s) handling Staging Project.