The tournament has been played in the summer and featured 32 teams for the first time this year in a move that was branded the "worst idea ever implemented in football" by former Liverpool manager Jurgen Klopp, but the ex-Arsenal boss has a different view.
Wenger, who now works as FIFA's chief of global football development, said: "I am going to give a very boring answer to a very interesting question. Everyone is entitled to an opinion and I don't share the view of Jurgen Klopp at all.
"I feel a Club World Cup is needed. If you make enquiries to all the clubs who were here then 100 per cent of answers would be that they would want to do it again. That's the best answer of what the clubs think of a Club World Cup.
"And the decisive question is do the fans like it or not? We believe the attendances were projected as low and in reality were much higher. The answer is there."
Wenger explained that FIFA is planning to learn from the hot weather and poor pitches at the tournament in the United States ahead of next year's World Cup in North America.
He said: "The heat in some games was a problem but we tried to combat that with cooling breaks, watering the pitches during the break and overall I feel we learned a lot on that front.
"In two different venues [there was a problem], one of them was Orlando. But we shouldn't underestimate the quality of the permanent [real grass] pitches.
"The grass is a bit different here. It's a bit harsher or more resistant than in other countries. The pitches were 'flat'. But once we watered the grass, everyone was happy.
"Certainly next year in stadiums there will also be more with roofs and the TV times will be more sensitive. At the same time, the weather conditions can be a problem for everybody.
"I asked our analysts to analyse the impact of the heat. We found heat of over 35C had an impact on high-speed running, so sprints, not distances. You have to be equipped to deal with it."