Display apparatus and controlling method thereof

Disclosed are a display apparatus and a controlling method thereof. The display apparatus according to the present invention comprises: a voice collection unit for collecting user speech; a communications unit for transmitting the user speech to an interactive server and receiving corresponding response information generated based on the user speech; a storage unit for storing control information corresponding to each user speech; and a control unit for transmitting the collected user speech to the interactive server and determining whether or not the control information corresponding to the collected user speech is stored in the storage unit. When the control information corresponding to the collected user speech is stored in the storage unit, the control unit performs an operation corresponding to the user speech based on the stored control information; and when the control information corresponding to the collected user speech is not stored in the storage unit, the control unit performs an operation corresponding to the user speech based on the response information received from the interactive server.