Started as an undefined US military project to the current global network, the Internet has been developing and improved at an amazing speed, which also brought out enormous challenges to the traditional way of life worldwide. By analyzing the features of the Internet, this paper reveals the impacts of the Internet on jurisdictional principles applied in traditional international civil and commercial cases and aims to apply traditional rules under the new environment of the Internet. In addition, by referring to the international uniform legislation and from the US judicial theories and practices, this paper also brings out reflections and suggestions regarding this issue.