本文针对国际私法之选法理论与法源，提出多元主义之看法。除传统选法理论之外，国际私法选法方法论上出现了即刻适用法与最重要关连理论，而与传统理论分庭抗礼。而在法源上，除传统之国内法源之外，二次大战后国际私法之国际法源如雨后春笋般出现，在欧盟更有欧盟统一国际私法运动之出现。然而，不管是新的选法方法论，或是新的法源，与传统方法论与法源理应处于并存之状态，而须于具体个案谨慎厘清不同选法结果之可能，以求得最适当的法律适用。
This article focuses on the illustration of the pluralistic phenomenon in Private International Law，both in view of methodology of Conflicts of Law and sources. Methodologically，immediate applicable law proposed by French Doctrine and the Most Significant Relationship Theory reacted to the American traditional doctrine，emerged in the 60s of the twentieth century. However，they served as coexisting methods with traditional ones，but did not replace them. As to the sources of law，after World War II，the tremendous multiplication of international sources began，not to mention the regional one derived from the European Private International Law. Nevertheless，these international，regional and national sources coexisted. From all of the above，it is necessary for us the private international lawyers to resolve each problem of conflict of laws，case by case，scrutinizing each possible method，source and result.
