
The most convenient way from Taipei Songshan Airport is to take the Taipei Metro to Taipei Main Station, then transfer to the High-Speed Rail (HSR).
After exiting the metro, follow the signs to the HSR ticket counters, purchase a ticket, and take the HSR from Taipei Station to Hsinchu Station.
Purchase a single journey ticket heading to "THSR Hsinchu Station".
Then, take Bus No. 182 from HSR Hsinchu Station to National Tsing Hua University.
Taipei Rapid Transit Map and Information: https://english.metro.taipei/cp.aspx?n=1BE0AF76C79F9A38

The fastest and most convenient way from Taoyuan International Airport to the HSR station is by taking the Taoyuan Airport MRT.
Purchase a single journey ticket heading to "A18 Taoyuan THSR Station".
Purchase a single journey ticket heading to "THSR Hsinchu Station".
Then, take Bus No. 182 from HSR Hsinchu Station to National Tsing Hua University.
Take Bus No. 1250 directly from Taoyuan Terminal 1 or Terminal 2 to National Tsing Hua University.
Taoyuan Rapid Transit Map and Information: https://www.tymetro.com.tw/tymetro-new/en/_pages/travel-guide/index.php

After taking a train from Taipei to Hsinchu Railway Station, exit from the Front Station (Main Exit). Walk along the small alley beside SOGO Department Store to reach the bus stop. From there, you can take Bus No. 1, No. 2, or No. 9003 to National Tsing Hua University.
Hsinchu Bus No. 1 or No. 2
Hsinchu Bus No. 9003
Taxi
Long-Distance Bus