This Recommendation describes the requirements for cloud gaming system including user requirements, service requirements, performance requirements, management requirements, security requirements, network requirements and terminal requirements for cloud gaming system. It also describes the typical scenarios including cloud game distribution scenario, cloud game running scenario, cloud game cross-platform scenario and cloud game live streaming scenario for cloud gaming system in the Appendix. This Recommendation is intended to provide a reference for cloud gaming service providers, platform providers and developers when they build and operate a cloud gaming system.