The Mass Rapid Transit (MRT) system run by the city government provides the most convenient commuting service between downtown and the suburbs of Taipei.
Website: http://english.metro.taipei/

The THSR currently goes through 10 main cities along the western part of Taiwan.
Website: http://www.thsrc.com.tw/en/?lc=en

Trains on the round-the-island rail network provide extremely convenient services. Tickets may be purchased three days in advance.
Website: https://tip.railway.gov.tw/tra-tip-web/tip?lang=EN_US