The invention relates to a prefabricated cabin server cabinet and a prefabricated cabin using the same. The prefabricated cabin comprises a screen cabinet set which is arranged in the prefabricated cabin and is formed by sequentially arranging and assembling a plurality of screen cabinets in the left-and-right direction of the screen cabinets, the left end and/or the right end of the screen cabinet set are/is provided with a server disc cabinet used for inserting the server, the front side face of the server disc cabinet is provided with a front cabinet door, the width size of the server disccabinet in the left-right direction of the disc cabinet is equal to the depth size of the screen cabinets in the front-back direction of the screen cabinets, and a left side door and a right side doorare correspondingly arranged on the left side face and the right side face of the server disc cabinet. By means of the server disc cabinet provided, the situation that when the cabinet door of the server disc cabinet is consistent with the cabinet doors of the screen cabinets in direction, the server disc cabinet is out of the screen cabinets is avoided, so that the situation that the passage ofthe prefabricated cabin becomes narrow is avoided, and later maintenance of the equipment is facilitated.