The 32-year-old has agreed a four-year deal with Mark Hughes' side and will compete with fellow summer signing Robert Green for a place in the starting XI.
Cesar, a Champions League winner with Inter, is aiming to repeat his achievements in Italy with his new club in the English top flight.
|50/1||QPR are 50/1 with Paddy Power to beat Manchester City 1-0 on Saturday
"It is possible. A few years ago nobody believed Manchester City would ever win the Premier League. So we have to dream. When you dream, things can happen. That's the reason I came here."
The Brazil international did admit, however, that the club have a long way to go from their 5-0 humiliation at the hands of Swansea City on the opening day of the season.
"I saw the first game," he continued. "Wow! It was terrible for them and they had some problems but these things happen in football.
"When I met the coach I asked him what happened in the first game. But they drew away in the second game [1-1 against Norwich] and that's a good result."
QPR face defending champions Manchester City on Saturday evening and Cesar could make his debut against his former manager, Roberto Mancini.
"I hope to be the No.1, but I have to work hard," he stated. "I have the ability but I know the Premier League is hard.
"My first game could be against my first coach in Europe. Roberto Mancini brought me to Inter. They have done well but we have to believe we can beat them."
The former Flamengo player went on to express his excitement at arriving in London to kick-off his Premier League career.
"London is a big attraction," he said. "It is one of the two or three best cities to live in the whole world. It reminds me of New York. It's perfect for my future too.
"The opportunity to play in the Premier League, the best football in the world. I can't wait to train, I can't wait to play."