Abstract：COPYRIGHT AND LIBRARIES IN AI ERA libraries are not only among the biggest purchasers of physical booksbut also they offer a multitude of readers with far greater access to them than could possibly be accomplished on an individual scalelibraries are a hub for readingdiscussionresearchand book-related and cultural eventsThe widespread use of personal computers and cyberspace generated open access and so digital libraries emerged being effectively searchable and substantially reproducible on the scale of the worlds great physical librariesdigital libraries haveexplodedin number and diversity but the establishment of universal digital libraries is still proceeding slowly which means that the digital access of many great works of literature and social commentary cannot be accessedCopyright is premised on the exclusive right to make copies and so a copy is a copywhether it is made by handphotocopiercell phoneor a computers Random-Access Memoryand whether it is printedsavedor temporarily cached11 Likewiseselling a digital copy online should implicate the same copyright interests as selling a physical copy over the counter12 First of allcopyright law offers exclusive rights in expressive works so as to incentivize creative pursuitscopyright law generates property rights in expressive works advancing the explicit goal of incentivizing the making of such workscopyright protects actual works of expressionnot the underlying general ideas or factual informationaverting authors from asserting too much control over the raw materials of creativity which means that copyright applies to any original work of authorship fixed in a tangible medium of expressionThis article mainly discusses how AI challenges the current copyright legal systemespecially when AI technology imitates certain human behaviorsuch as learningcreationinventionand interaction with othersThe article mentioned that AI as the author and inventorno longer a natural personbut a machinewhich brought challenges to copyrightIn additionit also discusses how the decision-making power between people and AI ideal allocationsand whether the support tools may finally control the decision-making process