http://blog.csdn.net/huyisu/article/details/24014407

1、在官网下载地址下载：

http://qt-project.org/downloads

根据自己需要下载。

我下载的是：

qt-opensource-linux-x64-5.2.1.run

2、ct+alt+t，快捷键打开终端，进入下载目录下，执行：

./qt-opensource-linux-x64-5.2.1.run

然后就是常规安装了。

下载方法参考如下：

I finally managed to do it,

to uninstall, I managed go to the installation directory, there is an
executable called MaintenanceTool, we need to run it, in order to
uninstall and remove Qt.

what to do:

open terminal,

go to the installed directory, and then

run MaintenanceTools by the following command

./MaintenanceTool

and it is done.....

也就是打开终端，进入到安装目录下，找到

MaintenanceTool

这个工具，执行就ok了。