The utility model relates to a car as a house inner space device for transform expansion, including the room driving license body, the seat is removed to driving license internal being equipped with in room, even there is the power unit of back -and -forth movement the bottom below of removing the seat, be equipped with vertical division board on the removal seat, the division board is the driver's cabin of front portion and the living room at rear portion with the internal part of room driving license, the front row is equipped with driving seat and is equipped with a plurality of additionalseats with vice driving seat and back row in the driver's cabin, and a plurality of additional seats are installed remove on the seat, additional seat is located the front of division board, be equipped with on the division board and run through the door. The utility model discloses an all install division board between driver's cabin and the living room and the additional seat in the back row inthe driver's cabin on one is removed the seat to the convenient whole space size from inside change driver's cabin of car as a house and living room, convenient and fast also realizes the intercommunication with driver's cabin and living room simultaneously.