Disclosed are a digital device and method of processing data therein. The present invention includes a first receiving unit for receiving application data, a second receiving unit for receiving a signal including a request for a search service and search word data for the search service, a memory storing search history data, a controller configured to perform a first operation based on the search word data in response to the received search service request, control to display a first search result data on a screen, if the displayed first search result data is not valid, add the received search word data to the search history data, and control to display a second search result data on the screen by performing a second search based on the search word data included in the search history data after the search service, and a display unit displaying the application data, the first search result data and the second search result data.