Security is important in our life, especially in our homes to protect our families and children. For that we build a system to help people feel safe at their homes. We named this system SDL (SmartDoor Lock). SDL easily helps people to know who is behind the door. This system home owner can access the website with username and password and then if any guest come to hisher home the device will capture an image of hisher using Raspberry pi and send it to the owner by wifi, then the owner will decide either to open the door or not. Finally, this system will increase safety and privacy, save time. Help the elderly, employees and people with special needs.