The increasing liberalization of financial markets has stimulated the presence of foreign bank entries. While making entry mode decisions, besides the efficiency of foreign banks, the conditions of host country are major considerations for foreign banks. In this thesis, I set up a theoretical model along a circular city to analyze the entry mode choice of Greenfield investment, joint venture and acquisition. By using Matlab to conduct numerical simulations, I find that benefit of soft information, efficiency barriers and relative efficiency are three major determinants to the entry modes choice. Foreign bank choose joint venture, Greenfield investment and then acquisition as its efficiency increases. Moreover, a less developed market is associated with more foreign bank entries. Bigger market size generally encourages foreign bank entry via Greenfield investment.