The Involvement of Assistive Robot in every aspect of our life is immensely increasing in today's world. A line follower robot to assist an office is developed which can securely transfer hard copy of office file from one room to another room an autonomously as per user direction. Anybody can call the robot from any room by pressing the apps bottom. A response of calling, the robot will come to the caller room following the path and a locker placed in the robot will be unlocked using press bottom of keypad. The caller then placed the file or any other materials in the locker and then the robot will come around the station where it left from. The locker will not open until the robot reaches the directed room to ensure the security. The robot smoothly follows path with the algorithm. In every office there required a peon to transfer files or other materials whereas they have to perform other tasks too. Their robot can be useful to decrease the workload of office peon to involve him with more important work.