The first group package tourists (G.P.T) from mainland China to Taiwan had started at 4th July in 2008. According to the agreement between mainland China and Taiwan government, the mainland China tourists will be allowed travel in Taiwan as G.P.T. Taiwan has started to shift from production to service economy. With the relaxation of travelling limits for mainland Chinese tourist to Taiwan there has been an enormous rise in the number of Chinese tourist visiting Taiwan. The interaction between Taiwan and Mainland China has increased dramatically in the last few years. The number of Chinese tourists visiting Taiwan has grown rapid ally after Taiwan relaxed its’ restrictions on Chinese visiting Taiwan in 2008. Due to the special circumstances in the bilateral ties between these two countries, it is important to study the gap of this tourism decision-making process in hotel. This study aims to research the characteristics and factors of choosing accommodation from the mainland China tourists and Taiwan Travel Agents. The willing to receive the G.P.T from mainland China in the supply side by using in-depth for 6 owners in Taiwan and the willing to choose the HOTEL in demand. side The interview was conducted between November 15st, 2010 and January 31th, 2011 for the mainland China tourists will be discussed. The data was analyzed using content analysis, the findings are as follows: This study will contribute to (1) understanding consumer's decision-making behavior for choosing a hotel, (2)hotels that will provide satisfactory products and services, and (3) enhancing operating performance in hotel industry. Furthermore, both governments' Staffs are considering in allowing Free Independent Travel (F.I.T) from Mainland China to Taiwan from 2011. Accommodation is an important item of traveling arrangement.