A content output device for outputting a content by synchronizing with an external content output device, the content output device comprising: a communication interface comprising communication circuitry; an output unit comprising output circuitry; and a processor configured to: control the output unit to output the content received from an external device through the communication interface; control the communication interface to transmit, in response to an output request for the content being received from the external device via a first communication network, the content to the external content output device via the first communication network and perform setting a connection with the external content output device via a second communication network; and control the communication interface to transmit, in response to completion of the setting a connection with the external content output device via the second communication network, the content to the external content output device via the second communication network, wherein the processor configured to: transmit, the content encoded to a quality less than a predetermined quality to the external content output device via the first communication network, and transmit, in response to connecting with the external content output device via the second communication network, the content encoded to a quality higher than the predetermined quality to the external content output device via the second communication network, wherein the first communication network is connected through an external network apparatus, and wherein the second communication network is connected without going through the external network apparatus. a communication interface comprising communication circuitry; an output unit comprising output circuitry; and a processor configured to: control the output unit to output the content received from an external device through the communication interface; control the communication interface to transmit, in response to an output request for the content being received from the external device via a first communication network, the content to the external content output device via the first communication network and perform setting a connection with the external content output device via a second communication network; and control the communication interface to transmit, in response to completion of the setting a connection with the external content output device via the second communication network, the content to the external content output device via the second communication network, wherein the processor configured to: transmit, the content encoded to a quality less than a predetermined quality to the external content output device via the first communication network, and transmit, in response to connecting with the external content output device via the second communication network, the content encoded to a quality higher than the predetermined quality to the external content output device via the second communication network, wherein the first communication network is connected through an external network apparatus, and wherein the second communication network is connected without going through the external network apparatus. control the output unit to output the content received from an external device through the communication interface; control the communication interface to transmit, in response to an output request for the content being received from the external device via a first communication network, the content to the external content output device via the first communication network and perform setting a connection with the external content output device via a second communication network; and control the communication interface to transmit, in response to completion of the setting a connection with the external content output device via the second communication network, the content to the external content output device via the second communication network, wherein the processor configured to: transmit, the content encoded to a quality less than a predetermined quality to the external content output device via the first communication network, and transmit, in response to connecting with the external content output device via the second communication network, the content encoded to a quality higher than the predetermined quality to the external content output device via the second communication network, wherein the first communication network is connected through an external network apparatus, and wherein the second communication network is connected without going through the external network apparatus. transmit, the content encoded to a quality less than a predetermined quality to the external content output device via the first communication network, and transmit, in response to connecting with the external content output device via the second communication network, the content encoded to a quality higher than the predetermined quality to the external content output device via the second communication network, wherein the first communication network is connected through an external network apparatus, and wherein the second communication network is connected without going through the external network apparatus.