Network storage is a key technology in information society.The network storage technology and its application were discussed.The background of the network storage application was analyzed.The characteristic of traditional storage technology DAS was analyzed. The linutation of the DAS was illustrated. The characteristic of two leading types of the network storage technology
NAS and SAN
were discussed. The advantages of NAS and SAN compared to traditional storage technology were analyzed. The uniform trend of NAS and SAN was pointed out. Comparison of DAS
NAS and SAN was giver. Future research directions of network storage were pointed out.