近代日本由鎖國到成為海洋國家，「北向」與「南進」是兩大重要策略。臺灣總督府的南進政策，又稱為「南支」或「對岸」政策，其本質上就是一種以勢力擴張考量為重心，目的在使華南、臺灣、南洋連成一氣，從華南開展「大陸政策」，以侵略中國大陸為主。 「南進論」實際推行的結果，是於二戰之前，日本基於大東亞共榮圈之宏圖， 對第一個殖民地台灣，展開了以軍事作戰為目的全面建設。並自二戰開始，台灣成為「日本軍需品的重工業後援站」、「前進南洋獲取資源的據點」以及「日本南進軟性文化交流的支援單位」三個角色，台灣總督府由此三個角色來具體落實對於台灣各項建設及政策之推動。至於台灣與南洋的關係，也在支援日本母國的政策思維下，得以多元發展。 本研究以二戰期間日本南進策略下，台灣與東南亞關係為研究標的，並以文獻分析法，針對已完成或出版的官方檔案、著作等文獻進行研究。並得出以下三項結論： 一、二戰時台灣與東南亞之關係，為近代日本外擴理論導致的蝴蝶效應。 二、太平洋戰爭爆發促成台灣與東南亞進一步交流。 三、二戰戰爭的現實面令台灣與東南亞的交流，有所興替和轉變。 During the WWII, Japan adopted ''Northward'' and ''Southward'' policy in order to expand its sphere of influence. Furthermore, under the Southward advance policy, Taiwan was involved as a bridgehead to move for connecting with Southern China, and Southeast Asia. The purpose of Japanese continental policy was to invade Mainland China. “The Southern Expansion Doctrine”practically started before World War II. At that time, Japan initiated to construct Taiwan as a military base under the ambition of Greater East Asia Co-Prosperity Sphere. Furthermore, since World War II, Taiwan played three different roles as “Heavy industry backup station of Japan military supply”,“Stronghold to approach resource of Southeast Asia” and “Supporting unit for Japanese cultural exchange under Southern advance policy”. The Office of Taiwan Governor-General specifically implemented all related construction and policy developments based on above roles. As for the relationship between Taiwan and Southeast Asia, it was developed by diversification based on the principle of supporting Japan as its mother country. This thesis focuses on the relationships between Taiwan and Southeast Asia under Southern advance policy of Japan during World War II. The method of analysis will be used the documentary approach and historical approach. The research findings would be as follows: 1.The relationships between Taiwan and Southeast Asia during World War II were deeply affected by modern Japan expansion policy. 2.The process of Pacific War actually facilitated the further communication between Taiwan and Southeast Asia. 3.The war brought the industry relationships between Taiwan and Southeast Asia to change or transformation.