Project Description: A smartphone Android operated SPY BOT. Now here is a simple way to control our robot using Bluetooth module HC-05 with your android Smartphone device. The controlling devices of the whole system are an Arduino, Bluetooth module, Servo motors. The main purpose of our project is to make 4 legged Spider bot, i.e., moving in the presence of obstacles. In some situations like industrial fire accidents to investigate the whole scene this robot will be helpful, it will reduce human loss. It is also used in army to detect the enemies and archeological department to go where human can't reach.