A standalone exe file requires Qt to be build statically, you can find how to do this in the wiki, althought you would have to have a comercial license to deploy it like that (search this forum cause there are some good post's about license models). if you just playing with Qt, for non comercial aplications, is better to keep Qt dinamically linked, and use some deployment software, like InstallCreator, or other like that, that will join exe and the dlls in a setup file, easely distributed.