Cloud computing is a network-based computing model, the core idea of which is to provide computing resources and services to users over a network connection. The basic concepts of cloud computing include: resource sharing: cloud computing resources can be shared by multiple users, resulting in higher resource utilization. Elastic scaling: Cloud computing systems can automatically adjust the number and configuration of resources according to demand to meet the needs of applications of different sizes. Servicization: Cloud computing resources are provided to users in the form of services, and users only need to purchase relevant services on demand without focusing on specific implementation details. Virtualization: Cloud computing resources are organized and managed through virtualization technology to achieve logical isolation and flexible allocation of physical resources. The principle of cloud computing mainly involves the following aspects: virtualization technology: physical resources (e.g. servers, storage devices, networks, etc.) are divided into multiple virtual resources through virtualization technology to achieve isolation, sharing and management of resources. Automated management: Automated deployment, monitoring, maintenance and scheduling of cloud computing resources are realized through automated management tools to improve resource utilization efficiency and reliability. Distributed Architecture: Cloud computing system usually adopts distributed architecture to decentralize computing and storage tasks to multiple nodes for processing in order to improve the scalability and fault tolerance of the system. Network technology: Cloud computing relies on network technology to realize access and management of resources, so it needs to be supported by high-speed, stable and secure network infrastructure.