The former forward believes Everton must play like West Brom to get the best out of the forward.
The Belgian striker has started the season strongly for the Blues and currently has seven Premier League goals to his name.
His latest came against West Ham before the international break when he levelled the scores, netting for the seventh straight time against the Hammers.
That feat saw him match a record held by club legend Dixie Dean, but Sharp believes that he could be scoring more for the side if the Blues play more to his strengths.
“He would probably be the first to admit his hold-up play could probably be a bit better but I think we've got to be better for him as well,” he told the Liverpool Echo.
“We need to give him more of the service that he wants and requires. When he was on loan at West Brom they played him perfectly, getting balls down to the side to run at defenders and I think that's Rom at his best.”
The former forward is also encouraged by the burgeoning relationship with the Gerard Deulofeu after he racked up another assist this season.
The winger played a pinpoint ball in behind the West Ham defence to set up Lukaku for the equaliser, something he has done regularly so far in this campaign.
The Spaniard has currently provided assists for Lukaku’s last five goals, and Sharp says that it is important that players are creating chances for the Belgian to put away.
“Any forward relies on the people around him to create chances whether it's Gerard Deulofeu, Ross Barkley or whoever providing the supply line,” he added.
“I think Rom has come in for a bit of unfair criticism over the past couple of years and people tend to forget that he's still only a young boy even though he's had the physique of a man for a long time.”