The present invention relates to a liquefied gas storage tank and a floating offshore structure having the same which can limit a movement of a liquid flow in a storage tank by installing a support member on an inner wall of the storage tank, and generate electric energy by converting an impact pressure created by a sloshing phenomenon into the electric energy. According to an embodiment of the present invention, the liquefied gas storage tank is installed on a floating offshore structure to store liquefied gas, and comprises: a support member installed on an inner wall of the storage tank; and a piezoelectric element installed on the support member to convert an impact pressure created by a sloshing phenomenon in the storage tank into electric energy.;COPYRIGHT KIPO 2016
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