How much by taxi from beijing airport to Inner mongolia hotel wangfujing?

The fare may be around CNY 90. You should take offical taxis from the taxi stands outside Gate 1, 1F, T1; outside Gate 5 to 9, 1F, T2. In T3, you can find them by following the signs inside the terminal building. Yes, one taxi can hold four passengers and one bag.

If by public transport, you may take Airport Express train from PEK to Dongzhimen Station, and change to metro line 2 to Chongwenmen Station, Exit E. Walk north for about 500 yards to the hotel. The fare totals CNY 28 per person, and it takes about 45 minutes.

Therefore, it may be a little bit cheaper to take a taxi. :)