Metro (MRT) — Greater Taipei has an extended Metro-System, called the MRT. There are currently 5 lines. The trains run from 6:00 a.m. to about midnight. A one-way trip costs about NT$ 20 to NT$ 65. The MRT-Stations are well monitored. Stations and trains are clearly identified in English. All stations are announced in four languages Mandarin-Chinese, Taiwanese, Hakka and English.
If you plan to use the MRT or buses more often, you could consider buying an Easy-Card. An Easycard is an electronic cash system which offers a 20% discount on MRT tickets, and a further discount if you take a bus after an MRT. An Easycard costs NT$500 to set up, of which NT$100 is a deposit which can’t be refunded unless you use it for several years (while the remaining NT$400 you can use to cover your actual travel costs). The Easy-Card can also be used for the ferries and for purchases at FamilyMart, Starbucks and 7-Eleven Convenience Stores. Click the following link to see the MRT map: