An electronic device comprising: a communicator; and a processor configured to: detect a first voice section from a first audio signal obtained by the electronic device; identify whether a wake-up word exists in a user's voice included in the first voice section; based on the wake-up word being identified to exist in the user's voice included in the first voice section, transmit the user's voice to a server for providing a speech recognition service via the communicator; based on response information regarding the user's voice being received from the server, provide a response to the user's voice based on the received response information; wherein the processor is configured to, based on a part of the user's voice matching with the wake-up word, identify that the wake-up word exists in the user's voice; and wherein the processor is further configured to: detect a second voice section from a second audio signal obtained by the electronic device within a predetermined period of time after identifying that the wake-up word exists in the user's voice; identify whether a predetermined word exists in the user's voice included in the second voice section; and based on the predetermined word being identified to exist in the user's voice included in the second voice section, transmit the user's voice included in the second voice section to the server via the communicator. a communicator; and a processor configured to: detect a first voice section from a first audio signal obtained by the electronic device; identify whether a wake-up word exists in a user's voice included in the first voice section; based on the wake-up word being identified to exist in the user's voice included in the first voice section, transmit the user's voice to a server for providing a speech recognition service via the communicator; based on response information regarding the user's voice being received from the server, provide a response to the user's voice based on the received response information; wherein the processor is configured to, based on a part of the user's voice matching with the wake-up word, identify that the wake-up word exists in the user's voice; and wherein the processor is further configured to: detect a second voice section from a second audio signal obtained by the electronic device within a predetermined period of time after identifying that the wake-up word exists in the user's voice; identify whether a predetermined word exists in the user's voice included in the second voice section; and based on the predetermined word being identified to exist in the user's voice included in the second voice section, transmit the user's voice included in the second voice section to the server via the communicator. detect a first voice section from a first audio signal obtained by the electronic device; identify whether a wake-up word exists in a user's voice included in the first voice section; based on the wake-up word being identified to exist in the user's voice included in the first voice section, transmit the user's voice to a server for providing a speech recognition service via the communicator; based on response information regarding the user's voice being received from the server, provide a response to the user's voice based on the received response information; wherein the processor is configured to, based on a part of the user's voice matching with the wake-up word, identify that the wake-up word exists in the user's voice; and wherein the processor is further configured to: detect a second voice section from a second audio signal obtained by the electronic device within a predetermined period of time after identifying that the wake-up word exists in the user's voice; identify whether a predetermined word exists in the user's voice included in the second voice section; and based on the predetermined word being identified to exist in the user's voice included in the second voice section, transmit the user's voice included in the second voice section to the server via the communicator. detect a second voice section from a second audio signal obtained by the electronic device within a predetermined period of time after identifying that the wake-up word exists in the user's voice; identify whether a predetermined word exists in the user's voice included in the second voice section; and based on the predetermined word being identified to exist in the user's voice included in the second voice section, transmit the user's voice included in the second voice section to the server via the communicator.