The club announced Pellegrini as their new head coach on Tuesday morning, after David Moyes left the club following the end of the season.
It seems the Chilean is keen to get started straight away, already identifying potential areas of improvement, namely the attack.
In his first press conference as 'Hammers' boss, Pellegrini said: "I think West Ham has a very good team. I know all of the players and I saw most of the games that they played last season.
"So I am sure that, with the players we have in this moment in the squad, and bringing maybe another four or five players in, we are going to have a strong team.
"I think that West Ham had a difficult season last season and I hope that next season we are going to play football that will delight the fans.
"I always play attacking football and we must try to reach important targets in the season."