I arrive to Pudong 7h +suitcase. Depart from Hongqiao at 11h. The best is bus line1 or metro line2?

Well, in usual time, shuttle bus line 1 spends around an hour on the way. But as you arrive in morning peak time, there is a great possibility of getting stuck in traffic jams.
So in order to make sure you can catch the next flight, you are suggested to take subway line 2 to East Nanjing Road and transfer to subway line 10 to Hongqiao Airport, although it is less convenient. The wholeway takes around 1.5 hours.