Electronic device and offline device registration method

An electronic device, comprising:

• a communication module configured to communicate with at least one nearby device located in a communication range of the electronic device;
• a memory configured to store information about the electronic device and at least one instruction;
• and
• at least one processor operatively connected to the communication module and the memory, the at least one processor configured to execute the at least one instruction to:
• verify, based on an utterance of a device control instruction for a target device, whether the target device is registered in the electronic device,
• search for the target device among the at least one nearby device based on a determination that the target device is a device not registered in the electronic device, wherein the search for the target device is based on identification information of the target device obtained from the utterance and the information about the electronic device, and
• perform offline device registration of the target device by performing communication with a found device found by the search.