Can i go to Shanghai Science and Technology Museum by maglev train?

Yes, upon arrival, you can take the express train from PVG to Longyang Road Station. It only takes around 8 mins. And the ticket fare is CNY 50 per person.
Then transfer to subway line 2 to Science & Technology Museum Station, Exit 7. The duration is around 5 mins. It costs CNY 3 per person. After arriving, walk to the museum directly.