The former Great British Bake Off presenter will take on the ceremony again after her debut last year.
"I am genuinely thrilled to be invited back," she said.
"It's a real pleasure to be the master of ceremonies once more, as we celebrate the very best in British television."
Perkins and her presenting partner Mel Giedroyc have previously won three BAFTAs themselves, for their work on the baking show.
Both Perkins and Giedroyc decided to quit the hit programme after the BBC lost the rights in a bidding war to Channel 4.
Both hosts joked they wouldn't be "going with the dough", and were replaced by Sandi Toksvig and Noel Fielding.
"Sue hosted the awards for the first time last year and her natural warmth and humour lit up both the room and our screens," said Clare Brown, director of production at BAFTA.
"She is a wonderfully talented presenter, comedy writer and performer, and we are absolutely delighted to welcome her back to host the ceremony again in 2018."
Perkins has hosted a number of TV shows throughout her career, including Sky's The Big Spell, BBC's Insert Name Here, Channel 4's Light Lunch and ITV's Mel And Sue.
The full nominations for this year's awards will be announced on 4 April, and the ceremony will take place on 13 May at the Royal Festival Hall.