Moffat - who co-created the BBC's Sherlock - told The Insider that the CBS update has changed too many elements from Conan Doyle's original tales.
"What we did with our Sherlock was just take it from Victorian times into modern day," he said.
"They've got three big changes: it's Sherlock Holmes in America, it's Sherlock Holmes updated and it's Sherlock Holmes with a female Watson. I wonder if he's Sherlock Holmes in any sense other than he's called Sherlock Holmes?"
Moffat confirmed that CBS opted to produce Elementary after being denied the rights to remake Sherlock, but insisted that he does not resent the network.
"I don't want it to sound like [co-creator] Mark [Gatiss] and I don't want other people to try this," he explained. "We welcome it, but don't damage the brand."
Elementary will air on Thursdays at 10pm on CBS this fall.