This book on security system provides the detail of how to make security system Intelligent, robust, portable and economic. It also provide the detail of various Image Processing Algorithms, Introduction to Matlab, Video Capturing and Transmission mechanism, Tracking phenomena, Communication between PC and external world, Microcontroller - focused on 8051, GPRS and MMS Technologies, and robotics i-e mainly focused on the practical implementation of Robotic arm. Sample program written in assembly language based on intel 8051 is provided for controlling the motion of the mentioned arm, also the sample of program written in C# is given for the implementation of MMS.