A steam structure includes a first arm, one side of which is provided with a
liquid storage component for replenishing and storing hair conditioning solution. The bottom surface of the first arm where the
liquid storage component is located has at least one first steam hole for outputting hair conditioning solution vapor. The other side of the first arm is provided with a styling heating component for providing heat to the
liquid storage component to vaporize the hair conditioning solution. The styling heating component has a second steam hole corresponding to the first steam hole, which cooperates with the first steam hole to output hair conditioning solution vapor. A hair styling device is also disclosed, including a first arm and a second arm hinged to one end of the first arm. The first arm includes the aforementioned steam structure. This invention has a hair conditioning solution storage function, facilitating users to add and store hair conditioning solution, and using the vaporized hair conditioning solution to moisturize the hair, achieving
hair care, moisturizing, and / or fragrance effects.