The Barca ambassador says Coutinho's style would suit the Barca system.
Coutinho, who has scored four goals in his last five games, was the subject of three failed summer bids from Barcelona, the last of which was worth an initial £113m.
"I would be very happy to see such a talented player wear the shirt I wore for so many years," said Ronaldinho.
"I believe the way he plays will perfectly suit Barcelona and would be delighted to see a player of such quality wear the shirt.
"I like the way Coutinho plays and the type of football he brings. Those types of qualities will hopefully help Brazil win the next World Cup."