Are there any public transport from Pudong International Airport to the downtown hotel at 01:00 am?

I am afraid not. Buses stop latest at midnight and Metro Line 2 stops even earlier.

Guess you have to take the cab services. If you do, you should have the address on paper since the majority of cab drivers do not speak any English.

Costs range from 150 - 200 RMB and prices increase during the night.

You can take shuttle bus Night Line to travel from the airport to the city center. Then take a taxi to your hotel.

If you tell me your hotel location, I can give you more specific details.