May I ask if there is a bus or Taiwan Railway from Taipei Taoyuan Airport to downtown Taipei at 1 o'clock in the morning?

Yes, but it's about to run out of cars

Buses are the most common as they are frequent and cheap. <br/>It takes about 1~1.5 hours to get to Taipei. <br/>The fare is about NT110~140. <br/>Get off at Taipei Main Station. <br/>It is available 24 hours a day. <br/><br/>The high-speed rail is faster, but you have to take a bus from the airport (fare NT30) to the high-speed rail Taoyuan Station. <br/>The time to Taipei is about 20 minutes, and the last bus from Taoyuan Station is 23:32. <br/>The high-speed rail fare is NT160. <br/>Get off at Taipei Main Station. <br/><br/>Taxis are available 24 hours a day. <br/>The time to Taipei is about 30-50 minutes depending on the road conditions and the driver's driving speed. <br/>From Taoyuan Airport to downtown Taipei, the on-site scheduled taxi costs about NT1200~1500, and NT20 will be added after 11:00 p.m. <br/>After entering downtown Taipei, it can take you directly to wherever you want to go. <br/>Welcome to click "Adopt", not "Useful"