A method and apparatus for providing a human-machine interface (HMI) mode of a vehicle are provided. The method, performed by a device of vehicle, for providing a human-machine interface (HMI) mode includes, determining an occupant's state, determining an HMI mode corresponding to the occupant's state among a plurality of predefined HMI modes, and providing guidance information to the occupant in a medium-specific output scheme corresponding to the determined HMI mode.