SEAN Economic Community (AEC) will become fully functional by 2015. It is the key turning point of Thai economy in all aspects –trades on goods, services, investment flows, skilled labours and capitals. Under AEC agreement, it is likely that Thailand will turn to trade more with countries in the region, reducing the role of current major markets. The free trade will enhance strong competition on services, enabling an increasing role of service sector to gear Thai economy. As far as industrial development is concerned, as Thailand starts to lose its competitiveness, it is therefore necessary for the sector to relocate the production base to other neighbouring countries in order to maintain its competitiveness through exploring and employing the opportunities offered by the free trade on investments under the AEC agreement. The free trade on skilled labours will intensify the labour competition. Therefore, Thai professionals in each sector will need to expedite the development of skills to respond to needs in the market, especially on language which remains the disadvantage of the Thais. Additionally, Thai labours will need to adapt themselves to international working standards. With regards to the free trade on capital flows where monetary values can become more fluctuated, Thai operators need to manage costs and eliminate risks of exchange rates.