The invention discloses a parking lot information management system supporting 3G mobile phone inquiry. The parking lot information management system supporting the 3G mobile phone inquiry comprises a control and management central server in wireless connection with a plurality of local parking lot information acquisition systems, a 3G module connected with the control and management central server, a data storage device connected with the control and management central server, and a plurality of 3G mobile phones in wireless connection with the 3G module through a 3G network base station, wherein a parking lot information processing module, a parking lot information inquiring module, a parking space reservation module, a navigation module and a parking lot searching module are integrated in the control and management central server, and the parking lot information inquiring module, the parking space reservation module, the navigation module and the parking lot searching module are connected with the parking lot information processing module and enable the 3G mobile phone inquiry to be achievable. The parking lot information management system supporting the 3G mobile phone inquiry is simple in structure, reasonable in design, convenient to realize, convenient to use and operate, high in reliability, and beneficial for intelligent management of a parking lot. The utilizing rate of the parking lot is improved, urban traffic pressure can be relived indirectly, and good social benefits and economic benefits are brought.