A display device comprising: a microphone; a display; and a controller operably coupled with the microphone and the display and configured to: cause the display to display a webpage including duplicated words, enter into a voice recognition mode according to a user request, according to entering into the voice recognition mode, extract a plurality of text contents in which a link exists based on a source code of the webpage and search the duplicated words contained in the displayed webpage from each of the extracted plurality of text contents, display different numbers at one side of each of the plurality of text contents including the searched duplicated words, receive a voice command via the microphone, convert the received voice command into text data, determine whether the voice command indicates a number or a text, access a link of a text content corresponding to a selected one of the displayed different numbers, if the voice command is determined to be one of the displayed different numbers based on the converted text data, display a webpage of the link by accessing the link of the text content corresponding to the selected one of the displayed different numbers, access a link of a text content corresponding to the text, if the voice command is determined to be the text based on the converted text data, and display a webpage of the link by accessing the link of the text content corresponding to the text. a microphone; a display; and a controller operably coupled with the microphone and the display and configured to: cause the display to display a webpage including duplicated words, enter into a voice recognition mode according to a user request, according to entering into the voice recognition mode, extract a plurality of text contents in which a link exists based on a source code of the webpage and search the duplicated words contained in the displayed webpage from each of the extracted plurality of text contents, display different numbers at one side of each of the plurality of text contents including the searched duplicated words, receive a voice command via the microphone, convert the received voice command into text data, determine whether the voice command indicates a number or a text, access a link of a text content corresponding to a selected one of the displayed different numbers, if the voice command is determined to be one of the displayed different numbers based on the converted text data, display a webpage of the link by accessing the link of the text content corresponding to the selected one of the displayed different numbers, access a link of a text content corresponding to the text, if the voice command is determined to be the text based on the converted text data, and display a webpage of the link by accessing the link of the text content corresponding to the text. cause the display to display a webpage including duplicated words, enter into a voice recognition mode according to a user request, according to entering into the voice recognition mode, extract a plurality of text contents in which a link exists based on a source code of the webpage and search the duplicated words contained in the displayed webpage from each of the extracted plurality of text contents, display different numbers at one side of each of the plurality of text contents including the searched duplicated words, receive a voice command via the microphone, convert the received voice command into text data, determine whether the voice command indicates a number or a text, access a link of a text content corresponding to a selected one of the displayed different numbers, if the voice command is determined to be one of the displayed different numbers based on the converted text data, display a webpage of the link by accessing the link of the text content corresponding to the selected one of the displayed different numbers, access a link of a text content corresponding to the text, if the voice command is determined to be the text based on the converted text data, and display a webpage of the link by accessing the link of the text content corresponding to the text.