The 28-year-old forward has been heavily linked with a move away from Spain this summer, with suggestions that he could make a sensational return to Old Trafford.
Manchester United chiefs are understood to be willing to break the bank to bring Ronaldo back to the Premier League, engineering a transfer that would give new manager David Moyes the perfect start to his reign, after he was announced as Sir Alex Ferguson's successor last month.
Speculation that Ronaldo could leave Real Madrid went into overdrive after the Portuguese international recently posted a comment on his Twitter and Facebook pages to deny reports he was set to sign a new deal, saying: "All the news about my renewal with Real Madrid is false."
However, Real Madrid president Perez is still confident that Ronaldo will spend the rest of his career in the Spanish capital, extending his stay far beyond the two years he still has to run on his current contract.
"Cristiano made these statements because there was some information in the media which did not match reality," explained the 66-year-old. "Soon we will clarify this issue.
"I have no doubt that Cristiano is going to retire at Real Madrid. I am convinced that he will renew.
"Keeping him is our most important activity, around whom we can build the Madrid of the future."
Since joining Real Madrid from Manchester United in an £80million deal in 2009, Ronaldo has scored 146 La Liga goals in 136 games, and has gone on to establish himself as one of the world's best players, second only to Lionel Messi.