Cloud computing and edge computing have evolved rapidly in recent years, and the combination of both, known as cloud-edge collaboration, offers the advantage of integrating the resources and capabilities of both sides to achieve more efficient management and optimization. However, with the increasing demand for real-time applications and the rapid growth in the number of edge nodes and devices, there are challenges in achieving real-time processing, low latency, and reasonable resource utilization rates at the system level. This has led to a need for QoS assurance requirements to guarantee the quality of the cloud-edge-device collaborative computing system. It can promote QoS assurance, and provide guidance for QoS testing processes in various application scenarios.