A method and an electronic device for a vehicle are disclosed. The electronic device is mounted in a vehicle and comprises a display, a memory for storing voice commands, and a processor. The processor operates by comprising the steps of: obtaining at least one of vehicle driving information, occupant information, and display output information; generating at least one shortcut command by simplifying one or more voice commands on the basis of at least one of the obtained vehicle driving information, occupant information, and display output information; and controlling a display unit to display at least one voice command guide UI displaying at least one shortcut command.