隨著電腦及網際網路的迅速發展，網路上各式的兒童色情問題，在近幾年來已成為國際社會及各國所須面對的重大問題之一。然針對此類犯罪行為，傳統中用以約束實體世界的規範，在適用到網際網路空間或新興的資料儲存設備時，不可避免地早已衍生出許多新的困難與問題，特別是在犯罪偵查方面。在國內，相關之問題還未受到太多的重視，然美國法院在近十幾年來，針對相關問題，已發展出大量的判決。因此，本文將以美國法院近年來之相關判決為基礎，來分析探討美國法院究竟係如何處理網路上兒童色情案件相關證據取得及搜索扣押之問題，藉以提供國內相關研究或實務上之運作作為參考。

With the advent of computer technology, the ability to produce child pornography has increased, and the distribution of child pornography has revolutionized. Electronic mail, anonymous re-mailing, chat rooms, and off-site storage facilities have made computers become a favored medium among child pornographers. In view of the advancing technological aspects available to those who traffic in child pornography, traditional tools used in criminal investigations, such as search warrant, must be adapted to respond to the new and emerging facets of this crime and the unique issues that arise within an internet child pornography case. This article will discuss the uneasy application of the United States Constitution's Fourth Amendment search and seizure law to internet child pornography cases, and see how United States' courts deal with those problems. By exploring how United States' courts deal with internet child pornography crimes, we can provide some references to our courts and law enforcements when they encounter the same problems.