You need to recompile Qt so you have a static build, then you can link against this build rather than the default which uses DLLs.

Read the license first though - if you statically link, your program must be either open-source or you must purchase a license from Nokia.

If you distribute the DLLs instead, you don't need to purchase a license, and your program can be closed-source. This is the default. Its also better, as you only need one copy of the DLLs on any one machine, rather than every program statically linking to them and using up memory and disk space.