This kind of garage is a Horizontal-circulation Parking System which can store or retrieve the parking vehicles with mechanics. It eliminates the entry and exit lanes of ordinary flat parking lots, improves the utilization of land, and is suitable to be located in narrow terrain. After using this equipment in basement, it not only saves the entry and exit lanes, improves the land use rate, but also reduces the emission of exhaust gas, reduces pollution and the cost of ventilation.