The invention provides a parking space intelligent query and reservation system and a method thereof. The system comprises a parking space information acquisition system, a parking lot gateway, a parking lot host computer, a parking space availability indication lamp, a local induction screen, a cloud server, and a reservation terminal. By using this system, a user can carry out reservation through inputting a target plate and selecting a satisfactory parking space. According to the system and the method, people who can not find a parking space can rapidly find a parking space which is in accordance with the needs of the people, the behavior of a subscriber can be regulated, the system has a parking space guidance function, parking space information forecasting can be carried out before the change of a parking space availability state, and problems in the prior art are solved well.