An Internet Protocol (IP) television (TV) and an operating method thereof are disclosed. The operating method includes storing first content data in a storage medium of the IP TV after receiving and decoding the first content data, detecting information of second content data stored in the storage medium if it is determined that a storage space of the storage medium to store the first content data is deficient, comparing the detected information of the second content data with information of third content data provided from a content server, and deleting the second content data from the storage medium if the information of the second content data is the same as the information of the third content data as a result of the comparison.