In-cabinet front air supply cabinet and machine room

The in-cabinet front air supply cabinet comprises a cabinet body, a front door, a side door, a rear door, a bottom plate assembly and a top plate, the cabinet body is of a frame structure and forms a ventilation area and an installation area in the front-back direction, and the front door, the side door, the rear door, the bottom plate assembly and the top plate are installed on the corresponding faces of the cabinet body respectively. The bottom plate assembly has a ground clearance relative to the ground, the bottom plate assembly comprises a bottom plate and a mesh plate spliced with the bottom plate, the bottom plate corresponds to an installation area, the mesh plate corresponds to a ventilation area, the front door, the side door, the top plate and the bottom plate are all of a sealed plate-shaped structure, the rear door is of a mesh-shaped structure, and external air flows into the cabinet body through the mesh plate and then flows out of the rear door. According to the front air supply cabinet in the