An electronic device configured to be physically connected to a head mounted display, HMD, device, the electronic device comprising: a communication interface; a memory; a display; and at least one processor electrically connected to the communication interface, the memory, and the display, wherein the at least one processor is configured to: output a first partial display area of contents in a binocular mode on the display, so that the contents can be watched through the HMD device, receive, from at least one external device (400, 500), request information related to sharing of a second partial display area of the contents being output in the binocular mode through the communication interface, identify attribute information of the at least one external device (400, 500), convert a format of the contents, which are stored in the memory, such that the format of the contents corresponds to the identified attribute information, and transmit the contents, the format of which has been converted, to the at least one external device (400, 500) through the communication interface; wherein, to transmit the contents, the at least one processor is further configured to: extract data related to the second partial display area from the contents; and transmit, to the at least one external device (400, 500), the data related to the second partial display area of the contents, the second partial display area specified through control of a user or by the at least one external device (400, 500), and wherein the second partial display area of the contents is larger than the first partial display area of the contents. a communication interface; a memory; a display; and at least one processor electrically connected to the communication interface, the memory, and the display, wherein the at least one processor is configured to: output a first partial display area of contents in a binocular mode on the display, so that the contents can be watched through the HMD device, receive, from at least one external device (400, 500), request information related to sharing of a second partial display area of the contents being output in the binocular mode through the communication interface, identify attribute information of the at least one external device (400, 500), convert a format of the contents, which are stored in the memory, such that the format of the contents corresponds to the identified attribute information, and transmit the contents, the format of which has been converted, to the at least one external device (400, 500) through the communication interface; wherein, to transmit the contents, the at least one processor is further configured to: extract data related to the second partial display area from the contents; and transmit, to the at least one external device (400, 500), the data related to the second partial display area of the contents, the second partial display area specified through control of a user or by the at least one external device (400, 500), and wherein the second partial display area of the contents is larger than the first partial display area of the contents. output a first partial display area of contents in a binocular mode on the display, so that the contents can be watched through the HMD device, receive, from at least one external device (400, 500), request information related to sharing of a second partial display area of the contents being output in the binocular mode through the communication interface, identify attribute information of the at least one external device (400, 500), convert a format of the contents, which are stored in the memory, such that the format of the contents corresponds to the identified attribute information, and transmit the contents, the format of which has been converted, to the at least one external device (400, 500) through the communication interface; wherein, to transmit the contents, the at least one processor is further configured to: extract data related to the second partial display area from the contents; and transmit, to the at least one external device (400, 500), the data related to the second partial display area of the contents, the second partial display area specified through control of a user or by the at least one external device (400, 500), and wherein the second partial display area of the contents is larger than the first partial display area of the contents. extract data related to the second partial display area from the contents; and transmit, to the at least one external device (400, 500), the data related to the second partial display area of the contents, the second partial display area specified through control of a user or by the at least one external device (400, 500), and wherein the second partial display area of the contents is larger than the first partial display area of the contents.