The Chelsea man will spend the season on loan at Goodison Park and said he is most looking forward to forming a partnership with striker Romelu Lukaku.
“I’m very happy to be joining Everton because it’s a great club, which likes to play football, and it’s a great pleasure to be here,” Atsu told evertontv.
“Playing in the Premier League has always been a dream for me and I have achieved that dream.
“This is the biggest level for me to play at. I know that it’s a very competitive league and I believe with hard work we’re going to be successful this season.
“I will be very happy to play with Lukaku. He’s a hard working guy and I believe we will work well together and come out successful.
“I’m a hard working guy, very fast with the ball and my greatest ability is to go one on one with my defender.
“I can’t wait to train with the players and work with the coach.”