This project explains the design of Arduino based smart car parking system. Authorization of car number plate in the database is the basic rule used to park a vehicle in a parking place. Authorization database will be given to each user, which carries the vehicle number or other details. If the faculty/student is authorized and space is available in the parking area, then the parking gate opens, and the user is allowed to park the vehicle in parking place according to their category and availability of parking slots else the user is not allowed to enter the parking even if the user is authorized .It manages the time, also provides security to a vehicle and an unauthorized user is not allowed to enter into a parking place whereas they are given separate parking slots. It helps to park vehicle in empty slot parking also as it will display which slot has free space.