The present disclosure relates to a method and a device for drawing a room layout. The method includes obtaining a sweeping path graph of a sweeping robot, the sweeping path graph comprising positions of N first obstacles and shapes and positions of M second obstacles encountered by the sweeping robot when sweeping a room, a bottom area of each of the N first obstacles being less than or equal to a first preset threshold, a bottom area of each of the M second obstacles being greater than or equal to a second preset threshold, wherein N and M are integers greater than or equal to 0; determining Q pieces of furniture arranged in the room based on the positions of the N first obstacles and the shapes and the positions of the M second obstacles, wherein Q is an integer greater than or equal to 0 and less than or equal to (N+M); and marking the Q pieces of furniture on a plan of the room to generate the layout of the room.