Rooney signed a new record deal on Friday.
"I want to bring more Wayne Rooneys to Manchester United," Moyes told MUTV after the club announced Rooney had signed his new contract.
"We're having to build again and start again.
"Part of the rebuilding (process) is making sure that you keep the players you really want to keep.
"We are looking to bring the best players in the world to the club.
"Wayne Rooney is one of the best in the world.
"I will be looking to make more signings in the summer and hopefully add to the quality we already have got.
"It (the signing) tells the fans it'll get better - and it will. I've had great support from the owners and the board - and it won't be the last, that's for sure."
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