By using media-free holographic display and interaction technology to replace traditional touch panels, holographic intelligent butlers and device operation interfaces are presented in the air, which can be applied to display interfaces of household appliances such as door locks, air conditioners, refrigerators, range hoods, etc., allowing people to open doors, adjust temperature, cook, and other operations without physical contact. This is conducive to creating a more comfortable spatial layout and bringing people a technological and futuristic living experience.