A method of authenticating and transmitting personal contents in order to easily share personal contents with acquaintances by using a display apparatus capable of accessing a network, and a display apparatus and a server therefor are provided. The method of transmitting contents includes: the display apparatus receiving at least one personal content of the at least one acquaintance from the server through the network; storing the received personal contents in relation to each acquaintance; and if the personal contents of the acquaintance are requested by the user of the display apparatus, reading the personal contents of the acquaintance among the stored personal contents and displaying the read personal contents. According to the method and apparatus, even when the user of the display apparatus does not perform linking with a corresponding server (or service provider), personal contents can be easily shared with acquaintances.