The print server is a device that looks like a router. Plug it in somewhere near your printer and router. Use the USB cord connected to your printer to connect it to the print server. There are a few ways to connect a print server to your router:   Using an Ethernet cable: You can connect it to your router using an Ethernet cable, in fact, some wireless print servers may require a wired connection during the setup process.  Wireless: If the print server has a "WPS" or "INIT" button, you can connect it to your router wirelessly by powering on the print server, press the "WPS" button on your router and then quickly press the "WPS" or "INIT" button on the print server. If you haven't already done so, power on your print server by turning on the power button. Most likely, the print server you purchased came with a CD that has the print server software on it. You can also download the print server software from the manufacturer's website. Use this CD to install the print server software on all computers on your network you wish to have access to your print server. Place it in the CD tray and launch the installer. The install process will be different from one print server model to the next. The CD installer will walk you through the process of connecting to your printer, and set up a wireless connection (if it is a wireless print server). You may need to provide your wireless password in order to connect a wireless print server to your network. Once you are finished, you can print a test page to make sure your printer is working.

TL;DR in Chinese:
插入打印服务器。 将打印机连接到打印服务器。 将打印服务器连接到路由器。 打开打印服务器。 安装打印服务器软件。