The duo worked together at Valencia, and the left-back helped Los Che achieve a third-placed finish last season and secure Champions League football for another season.
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The 23-year-old has enjoyed a sensational rise to prominence in recent months, topping off a fabulous Euro 2012 by scoring in Spain's 4-0 final win over Italy.
Big things are now expected of the player, and Emery believes that his former player has the physical and mental attributes to make an impact for the Blaugrana.
"He is a player trained, prepared, hungry for success and, above all, humble. With all that, he will succeed. I'm sure," Emery told El Mundo Deportivo.
"At first the boy did not want to play left-back, but then he just wanted to play in that position. He is a much-travelled player, with speed and surprise.
"The play that best defines him was the goal he scored in the [Euro 2012] final against Italy."
Alba's packed summer schedule saw him follow his Euro 2012 heroics with a less successful showing with Spain's Olympic side, who crashed out in the tournament's group stages.
There are concerns that the young talent may suffer from burn-out, but Emery does not believe Alba's hectic summer will be a problem.
"[A problem?] I think not. Jordi has strength and youth. I have also a player with Brazil, Romulus, who of course I would like to be already working with us, but [the players] have an understandable enthusiasm for the Games," Emery explained.