You can use the updater i think. Just unselect everything that you installed before and let it run.

But I can’t find the QT SDK in updater.

In Qt Creator
Menu help > start updater …

The default install location is your home directory. There should be a directory named QtSdk. The brutal way is to remove the directory. Somewhat more elegant is to use the uninstall executable that lives in the bin directory.

try this one… [developer.qt.nokia.com]

hi i want un-install my qt sdk where its location in ubuntu 11.04..and what is its command for uninstalling …

Believe QT SDK would come up with an uninstall binary to do the un-installation of Qt. You may search for uninstall in your installed folder and try to run it, which will do the process for you.

Or crude way is to delete the entire installation folder.

Uninstall:
depends on how you installed it. If you have downloaded the installer run ~/qtcreator-x.xx…/bin/uninstall
If qt was installed from the repository check what qt packages you have installed (enter: dpkg -l | grep qt) and remove the packages you do not want (enter: apt-get remove package_name )