从美The Department of State官网查到的。。。

ENTRY/EXIT REQUIREMENTS: U.S. passport holders will be allowed to enter Taiwan without a visa for up to thirty days (no extensions allowed) if they have a passport valid for at least six months from the date of entry into Taiwan and have a confirmed return or onward air ticket. Travelers must have already met any additional visa requirements for the next destination, if applicable. If the passport is valid for less than six months from the date of entry into Taiwan, travelers may apply for a landing visa that has a duration of stay of no more than thirty days. The processing fee is NT $5123 (currently equivalent to approximately US $155.00; U.S. currency is not accepted), and no extensions are allowed. Travelers also have the additional option of applying for and receiving a Taiwan visa prior to arrival in Taiwan. The processing fee is US $131.00.

Please Note: No extension of stay or change of status is allowed if the traveler enters on the visa
waiver program (30 day stay, no extensions). Travelers arriving in Taiwan with a valid passport and valid Taiwan visas may be admitted for up to 90 days even if their passports are valid for less than 6 months. Travelers who apply for a landing visa upon arrival will be admitted for 30 days or up to the day the passport expires, whichever comes first. For specific information about entry requirements, travelers may contact the Taipei Economic and Cultural Representative Office (TECRO), 4201 Wisconsin Avenue NW, Washington, DC 20016-2137, via either its main telephone number, [phone], or its Consular Division telephone number, [phone]. The main fax number at TECRO is [phone], and the Consular Division fax number is [phone]. TECO (Taipei Economic and Cultural Office) also has offices in Atlanta, Boston, Chicago, Guam, Honolulu, Houston, Kansas City, Los Angeles, Miami, New York, San Francisco and Seattle.