Netherlands international Ake, 24, has emerged as one of Bournemouth’s most important players since signing from Chelsea four years ago.
He initially impressed on loan in Eddie Howe’s side before signing on a permanent basis for a club record £20million.
Chelsea have been heavily linked with a move for their former player and Merson reckons Ake would be a welcome addition at his former club Arsenal.
Asked which areas Mikel Arteta should be looking to strengthen ahead of the summer transfer window, Merson told Sky Sports: ‘They need a centre half and a world-class holding midfielder.
‘I think Arsenal need to play with a back three. They’re not good enough as defenders to play as a four.