Having already wrapped up the Bundesliga title and progressed to the DFB-Pokal final, the Bavarians are just a few steps away from becoming the first German outfit to win the treble.
Despite their scintillating football this year, Muller insists that the result is the only thing that matters when they face the tournament favourites.
"We want to crown our season, so we'll go to the limit in every respect, myself included," Muller told FCB.tv.
"Barca are confident enough in themselves not to be looking at us. But they won't have failed to notice we're in scintillating form. We have to keep it tight at the back and keep a clean sheet at home if possible.
"That's the be-all and end-all if we want to make it to the final. And I really don't care whether we play pretty football or not. The only thing that matters is the result. I'm optimistic, but everyone knows it'll hardly be a stroll."
Bayern host Barcelona at the Allianz Arena on Tuesday night.