Our final year project is GSM SECURE DOOR. We usually come across areas where a user needs to control his domestic or company door lock from wide distances. Here we propose a system that allow user to unlock a door by entering a password. We propose to use GSM technology ie through SMS. Our system allows user to send an sms with password in order to unlock a door. The door opens on receiving the right password. The system also alerts the user upon the status of locking or unlocking the door. The circuit consists of a gsm modem to receive sms data. It decodes the sms and sends it to an Arduino Uno. The Arduino then reads the input and checks the password entered. When it receive the right password it opens the door by activating the motor.