Cox Plate winner Adelaide will remain in Australia to be prepared for an autumn campaign.

Keeping to a plan revealed before Adelaide's last-to-first Cox Plate triumph last month, the four-year-old will go into leading Sydney trainer Chris Waller's Rosehill stable and will target the $4 million Queen Elizabeth Stakes at Randwick.

Since Adelaide defeated Australia's best weight-for-age horses at Moonee Valley there had been speculation the entire would continue to be trained by Aidan O'Brien in Ireland.

But Coolmore's Australian spokesman James Bester confirmed on Wednesday that Waller would prepare Adelaide for The Championships in Sydney.

Waller said he had already inspected Adelaide at Coolmore's Hunter Valley stud.

"I've been up to see the horse. He's a fantastic individual," Waller said.

"They put him out into the paddock while I was there and he moved so effortlessly. He's a very athletic horse."

Waller intends to meet with O'Brien at the champion trainer's Ballydoyle training set-up in Ireland to discuss Adelaide's Australian campaign.

"I want to have a chat to Aidan to find out what we need to do to have him ready without over-racing him," Waller said.