The invention provides an intelligent parking lot management system which comprises an entrance and exit management and charging system, a location and navigation system, a parking stall control system, a data communication system, a data service system, an administrative client system and a network function service system. The invention also provides an intelligent parking lot management method which comprises car entrance/exit management, client return and car-search management and car location and navigation methods. According to the invention, intelligent parking lot management automation can be realized, and a parking lot can be managed highly efficiently and accurately. Thus, costs of manpower and material resources are saved greatly.