Science and technology are improving very fast and we are becoming dependent on technology gradually and it has made our maintenance easy and saves our valuable time. Dropbox Card Collector Access Control System may be the best and ideal solution for your Crowed control . Authority of different organizations are spending so much money every year for the lost visitor card and also have to issue new visitor card ; security threats given by the missing visitor access cards is also a big problem ,in this situation Dropbox Card Collector System has come up with the smart and most effective solution for which you have waiting eagerly for long science .In this system the guest and visitors or users can easily drop their visitor card into the dropbox and in this great process the visitors will achieve access for exit or entry . Dropbox Card Collector Access Control System has been designed with such a high technology that by dropping access or visitor card the visitors can entry and exit the building. When visitors leave the building he or she will drop the card into the drop box ;if the visitor card is valid it will be accepted by the collection bin and the gate open when the visitors integrate the access control system and if the card is invalid it will go to the exit tray at front . So there is no chance to leave the entrance gate which is very important for the visitors access management system in big buildings, shopping mall , airport and so on . In Dropbox Card Collector Access Control System the cards are reusable, when visitors leave access rights will be removed and it will be stored in the box . It is also used by the staffs and in this case they place the card into the dropbox and the card loses its access rights and it becomes useless and it will reactive again the next day when he or she places the card into the entrance card reader, so it can be used in entrance gate or barriers like turnstile. As dropbox works complete accurately and make difference between genuine and fake card so visitors never can leave the building taking the valid card with them and this is very important because later there is no chance to enter the building with the help of the stealing cards and the owner does not need to prepare visitor cards again and again . In the visitor cards important information is installed which is very effective. Now Dropbox Card Collector Access Control System is widely popular all over the world and also in Bangladesh.