His amazing attacks came BEFORE he was charged by the FA for comments made to Dean and match officials in their room after the 1-1 draw at the Hawthorns.
The Frenchman first blasted Dean, saying “he saw what he wanted to see" when he awarded West Brom a late penalty for handball on Sunday.
Wenger then continued his assault on the 49-year-old official, claiming his style of refereeing was like something from the “Dark Ages".
The FA have since confirmed they will be reviewing the outbursts from Wenger which came as he gave his media briefings ahead of Chelsea's visit to The Emirates tonight.
In his fresh attack on Dean, who ruled Calum Chambers had deliberately handled at the Hawthorns, Wenger said of refs: “They have not to be the star.
“We want them to respect the game and make the right decision and the ego should not interfere in that.
“It's not [appropriate] any more, in 2018, that the guy calls a player, speaks half a minute, or a minute to him, to say, 'Look, you have to behave properly'.
“That is gone. That is not the rhythm of a modern society. People want crisp, sharp action, and the referee has to make sure that happens.
“This is (not) the 1950s, where the guy talks to him (and says), 'If you're not nice, I might punish you'.
“What does it help for the game? Nothing. Nothing happens. People who sit in the stand don't want to see that.
“They want to see, 'Come on, let's get on with it and play'. That's our responsibility. We don't live in the Dark Ages."
Jay Rodriguez converted the penalty on Sunday and continuing his blast Wenger said: “This one is a bit of a farce, seriously.
“Because you do not give in the last minute of a game a penalty like that. When you see how he (Dean) shows his arm it is nothing to do with what happened. So he sees what he wants to see."
Wenger also confirmed Dean had told him to “keep quiet" when he confronted him after the final whistle.
He also claimed his team had been the victims of other bad penalty decisions at Stoke, Watford and Manchester City, adding: “It's unbelievable what happened this season. That is a concerning coincidence for me."