Speech recognition method and device

A speech recognition device, comprising:

• a template DB for storing identification information comprising a wakeup word made with a mechanical sound and a second characteristic value representing a voice characteristic of the mechanical sound;
• a microphone for receiving a voice;
• a processor;
• and
• a memory for storing instructions that may be executed by the processor, wherein the processor is configured to:
• receive a wakeup word through the microphone in a standby mode;
• extract a first characteristic value from the received wakeup word;
• and
• compare a first characteristic value of the extracted wakeup word with the template DB, control to enter to a speech recognition mode for voice recognition of a speaker, if the template DB does not store the second characteristic value corresponding to the first characteristic value, and to enter to the standby mode, if the template DB stores the second characteristic value corresponding to the first characteristic value.