System and method for contents delivery using data segment information, and proxy server thereof

PURPOSE: A system and a method for contents delivery using data segment information, and a proxy server thereof are provided to minimize the use of network resources by transmitting the rest data except a data segment pre-stored to a client proxy server from a content server proxy server. CONSTITUTION: In consideration of data segment information, a content server proxy server(130) transmits the rest data except data segments among content data of a content server(140). A client proxy server(120) transmits the data segment information to the content proxy server, and the client proxy server reconfigures the contents through the use of the stored data and the rest data.