In recent times the number of vehicles is consistently rising and parking space is becoming a major issue in urban and semi urban cities so there is a need to design a parking system which will reduce manual work as well as reduce the problem of cars parking on streets. Since in modern world, where space has become a very big problem and in the era of miniaturization it has become very important to avoid the wastage of space in modern, big companies and apartments etc. Automatic Car Parking enables the parking of vehicles-floor after floor and thus reducing the space used. In this report we have implemented the concept of smart car parking system. As we see in the modern world everything is going in automation, here we have deployed an automatic Arduino based system which is used to sense the presence & movement of vehicles and depending on availability of space it allows parking and same is displayed on web based GUI. Camera is used to detect the presence of vehicle in parking slot. There is also RFID module that will provide security as users who have authority can swap the RFID cards and get entry otherwise. This project is designed for automatically parking a vehicle into the desired parking spot.