Transportation from Pudong Airport to 839 Renmin Road

I think subway is a good choice for you. Take line 2 and switch to line 10 at Nanjing Rd (E). Get off at Yuyuan Garden and walk west along Renmin Rd for 5 minutes to your hotel.
The fare is 7RMB for an adult, free for the children under 4.3 feet, and half-price ticket for children between 4.3-4.6 feet.

Thanks Alexander! Are there bigger taxi that can fit 4 adults and 2 kids plus the luggages at the airport? How much would it approximately cost to take taxi from Pudong airport to 839 Renmin Road? Thanks!

No, official taxis all can only take at most 4 adult passengers. But you can dial +86 021 96822 to reserve a MPV from the Dazhong Taxi Company. It may cost CNY400-500 in my experience. Or you can book the pick-up service from an agency like Travel China Guide, whose contact is bookingtravelchinaguide.com for your reference.