How can I get to Shanghai international studies university by shuttle bus from Pudong airport?

As I know, this university has at least two campuses. Which one will you head for?
If it is Honnkou campus at West Dalian Road, you can take shuttle bus line 4 to Luxun Park, which is around 900-1,000m from the university. So you can take a taxi to reach there very fast upon arrival at Luxun Park.

If you mean Songjiang campus at Wenxiang Road, you can take shuttle bus line 3 to Dapu Road, from where you can walk to Dapuqiao MTR Station to take subway line 9. You need get off at Songjiang University City Station. Then a taxi can take you to the campus in several minutes.