An interactive system, an first server and a control method thereof are provided. According to a method for controlling the interactive system, the first server includes storing query data generated by inputting a keyword to a pre-analyzed utterance pattern by an first server, receiving a user's voice, converting the user's voice to voice data and transmitting the voice data to the first server by a display apparatus and in response to the voice data being received, performing a search regarding the user's voice by being the first server using the stored query data.