To build an Amazon cloud server, you need to register an Amazon AWS account, enter the AWS console, select the EC2 service, create an instance and select the required operating system and configuration, such as Ubuntu, and perform network and security settings. Then, allocate an elastic public IP and connect to the remote desktop to start using the cloud server. It should be noted that you must understand the billing model and security settings of the cloud server before use, and follow best practices to protect data security and privacy.

First, log in to the Amazon AWS console, select the EC2 service, click "Launch Instance" to create a new virtual machine, select the operating system and instance type suitable for the project, set security group rules and storage volumes, and obtain the public IP address after starting the instance. Use SSH to connect to the instance in the local terminal, install the required software and configure the service to complete the construction of the Amazon cloud server.