Vegetarian food

Is vegetarian food healthier than non-vegetarian food? A few months ago, a restaurant with only vegetarian food was opened near our company, every lunchtime there are consumers full of the restaurant and many consumers lined up at its door to wait for seats available.

I also heard about vegetarian food a long time ago, I would like to have a try in the restaurant, but it seemed that I always have no opportunity, because the restaurant has a limited opening time, maybe only one or two hours at each dinner time.

I will try vegetarian food in other restaurants in the future, I also think it is healthier than non-vegetarian food because I have searched and learned some information about it on the Internet.