Walter Benjamin is a significant ideologist in Post-Modern research that can not to be neglected.His study on the ideological and cultural aspects had deep insight into the predictions of the post-modern cultural turn---Culture is managed by the mass media, and it continues to gloss over itself to pursue business profits and political intentions.The article first briefly reviews the history of Benjamin's life, and then introduces his magnum opus--The Art Work of the Machine Replication, which is the embodiment of technocracy. This book points out technological innovation would bring about great influence on de-velopment of the arts and even change the audience perceptual approach.From the occult caused by irreproducibility fo the popularity caused by me-chanical reproducibility, this process results in the conversion of transmission mode, and leads to the disintegration of artwork's comtents and the authenticity.