The invention provides an intelligent parkingand illegal parking detection system and a using method thereof. The intelligent parkingand illegal parking detection system includes a parking detection device (10), a car mobile terminal (11), a data center processor (12) and a manager terminal (13), and wireless information transmission is carried out among the parking detection device (10), the carmobile terminal (11), the data center processor (12) and the manager terminal (13). When the intelligent parkingand illegal parking detection system is in use and a car owner inputs a specific destination location through the car mobile terminal (11), the car mobile terminal (11) searches for parking information near the destination and provides the location of a free parking space to the car owner, the car owner selects the appropriate free parking space at the car mobile terminal ( 11) according to various factors such as time, distance, road condition and parking fee, the owner makes a parking space reservation through the car mobile terminal (11), and after the reservation is successful, a car moves to the reserved parking space according to the corresponding navigation prompt. The intelligent parking and illegal parking detection system and the using method thereof can timely inform the car owner who need to park the car of parking space information in a region, the parking time of the owner is greatly saved, and the utilization of the parking space in the entire region is improved.