The small and medium-sized enterprises (SMEs) are the foundation of Taiwan's industrial development, which account for 97% of the total number of corporations in Taiwan and 70% of the employed labor. However, the global financial crisis triggered by the 2008 subprime mortgage crisis and the collapse of Lehman Brothers has rapidly evolved into a global credit crisis: bank failures, declines in various stock indexes, and large reductions in the market value of equities and commodities worldwide. The crisis led to aliquidity problem, which severely contracted the intra-credit-markets among the supply chains of the SMEs. This paper first discusses the effect of the financial tsunami on the SMEs in Taiwan and the government has announced the principle“Government supports banks, banks supports enterprises, and enterprises supports employees" (Three support principle) in response to the financial crisis. Furthermore, this paper is going to propose to the owners of the SMEs some management strategies under the financial tsunami. As to the government policies, this paper proposes a possible adjustment of the SME Guidance System in order to improve the competitiveness of the SMEs in Taiwan and reach the goal of sustainable management.