Simply put, cloud computing is the delivery of computing services—including servers, storage, databases, networking, software, analytics, and intelligence—over the Internet (“the cloud”) to offer faster innovation, flexible resources, and economies of scale. You typically pay only for cloud services you use, helping you lower your operating costs, run your infrastructure more efficiently, and scale as your business needs change.


Cloud computing is a big shift from the traditional way businesses think about IT resources. Here are seven common reasons organizations are turning to cloud computing services:


Cloud computing eliminates the capital expense of buying hardware and software and setting up and running on-site datacenters—the racks of servers, the round-the-clock electricity for power and cooling, and the IT experts for managing the infrastructure. It adds up fast.




The benefits of cloud computing services include the ability to scale elastically. In cloud speak, that means delivering the right amount of IT resources—for example, more or less computing power, storage, bandwidth—right when they’re needed, and from the right geographic location.


现场数据中心通常需要大量“机架和堆栈”- 硬件设置、软件补丁和其他费时的 IT 管理事务。云计算避免了这些任务中的大部分,让 IT 团队可以把时间用来实现更重要的业务目标。








Not all clouds are the same and not one type of cloud computing is right for everyone. Several different models, types, and services have evolved to help offer the right solution for your needs.

First, you need to determine the type of cloud deployment, or cloud computing architecture, that your cloud services will be implemented on. There are three different ways to deploy cloud services: on a public cloud, private cloud, or hybrid cloud.


公有云为第三方云服务提供商所拥有和运营,他们通过 Internet 提供其计算资源(如服务器和存储空间)。Microsoft Azure 是公有云的一个示例。在公有云中,所有硬件、软件和其他支持性基础结构均为云提供商所拥有和管理。使用 Web 浏览器访问这些服务和管理你的帐户。





云服务类型:IaaS、PaaS、无服务器和 SaaS

大多数云计算服务都可归为四大类:基础结构即服务 (IaaS)、平台即服务 (PaaS)、无服务器和软件即服务 (SaaS)。它们有时候称为云计算堆栈,因为它们互为构建基础。了解这些服务及它们之间的差异,可使你更轻松地实现业务目标。

  • 基础结构即服务 (IaaS)

    The most basic category of cloud computing services. With IaaS, you rent IT infrastructure—servers and virtual machines (VMs), storage, networks, operating systems—from a cloud provider on a pay-as-you-go basis

    Learn more about IaaS
  • 平台即服务 (PaaS)

    Platform as a service refers to cloud computing services that supply an on-demand environment for developing, testing, delivering, and managing software applications. PaaS is designed to make it easier for developers to quickly create web or mobile apps, without worrying about setting up or managing the underlying infrastructure of servers, storage, network, and databases needed for development.

    Learn more about PaaS
  • 无服务器计算

    Overlapping with PaaS, serverless computing focuses on building app functionality without spending time continually managing the servers and infrastructure required to do so. The cloud provider handles the setup, capacity planning, and server management for you. Serverless architectures are highly scalable and event-driven, only using resources when a specific function or trigger occurs.

    Learn more about serverless computing
  • 软件即服务 (SaaS)

    Software as a service is a method for delivering software applications over the Internet, on demand and typically on a subscription basis. With SaaS, cloud providers host and manage the software application and underlying infrastructure, and handle any maintenance, like software upgrades and security patching. Users connect to the application over the Internet, usually with a web browser on their phone, tablet, or PC.

    Learn more about SaaS


You’re probably using cloud computing right now, even if you don’t realize it. If you use an online service to send email, edit documents, watch movies or TV, listen to music, play games, or store pictures and other files, it’s likely that cloud computing is making it all possible behind the scenes. The first cloud computing services are barely a decade old, but already a variety of organizations—from tiny startups to global corporations, government agencies to non-profits—are embracing the technology for all sorts of reasons.

Here are a few examples of what’s possible today with cloud services from a cloud provider:

  • 创建新应用和服务

    在任何平台上快速构建、部署和缩放应用程序(Web、移动和 API)。访问所需资源,帮助满足性能、安全性和符合性要求。

  • 构建并测试应用程序


  • 存储、备份和恢复数据

    通过 Internet 将数据传输到可从任何位置和任何设备访问的离线云存储系统,可降低保护数据的成本(大规模缩放时)。

  • 分析数据


  • 对音频和视频进行流传输


  • 嵌入智能


  • 按需交付软件

    按需软件,也称为软件即服务 (SaaS),可随时随地为客户提供最新的软件版本和更新。

Microsoft 和云计算

Microsoft is a leading global provider of cloud computing services for businesses of all sizes. To learn more about the Microsoft cloud platform, our serverless application platform, and how Microsoft Azure compares to other cloud providers, see What is Azure? and Azure vs. AWS.