Conte was officially unveiled yesterday by Juve.
"The next few months will tell us whether he is the right choice, but his CV is known to everyone," said Buffon.
"As a Coach he has always achieved the objectives that he targeted, he's a winner.
"As a player he was very charismatic and positive. He knows the environment well too. But there is a big gap from that to winning.
"He'll need every player to be at his disposal and especially the support of the club. Without a strong club behind you a Coach won't win anything."