It provides a high-pressure steam-heated grill unit. Steam-heated roasting the high pressure body is divided by a cooking space and installation space having an opening provided; The guyi passing another premises having a different diameter in the cooking cavity are provided to be a predetermined distance apart constitute the said opening and in communication, side adhesive having a through hole on a front surface of the guyitong is securely fixed, the steam inlet pipe and a discharge pipe formed at the bottom and, it stepped portion provided roasting chamber for mounting the shelf on the inside of the other premises; A plurality of heaters that are installed between the roasting pass other premises generates an external power source is applied during heat; Is installed in the installation space is connected via the steam inlet pipe and the first connecting pipes, the steam generator for supplying steam to the high pressure of the guyitong; Remainder water storage tank is installed in the installation space is connected via the discharge pipe and the second connecting pipes; It is configured to be installed on the front of the control section and the cooking cavity for controlling the operation of the heater and the steam generator includes a door for opening and closing the roasting chamber can be quickly and conveniently cook various roasting materials, baking the material in the cooking process, It can utilize the unique taste of having, and makes it possible to easily perform the washing operation of the inner guyitong.