Method for changing building envelope function

A method for changing a building envelope function using a multipurpose building envelope structure, which includes:

• a support frame installed on a structure of a building;
• a guide frame protruding outwardly from the support frame;
• and an exterior enclosure forming the exterior of the building and installed on the guide frame in a drawer-like manner, the method comprising the steps of:
• a) detaching, from an exterior structure, a target exterior enclosure to be changed in function;
• b) sliding the target exterior enclosure on a guide frame and extracting out of the exterior structure in a drawer-like manner;
• c) removing a cartridge inside the target exterior enclosure and inserting a new cartridge having a new function;
• and
• d) sliding the target exterior enclosure on a guide panel to insert into the exterior structure in the drawer-like manner and inserting the target exterior enclosure back into the exterior structure by sliding the target exterior enclosure, like a drawer, along the guide panel, and
• performing the steps in sequence.