A two-direction expandable mobile house can be configured, for example, as a recreational vehicle or similar type of mobile home. The expandable mobile house can include a main body structure, two expandable structures including sliding wall panels, floor panels with hinges, and expansion mechanisms. The outside walls can be driven out by some hydraulic rods or by other mechanisms that can provide the same function connection linkages. The expandable floor panels can be stowed folded vertically. They can be connected to the main body frame with hinges. Small side wall panels can be designed to slide out from the main body frame. A flexible roof is able to be folded back into the main frame. The roof can include two inner boards for covering the expanded rooms.