Automation is a process it is use for automatic controlling of a complex electro-mechanical systems and Circuit in Bangladesh. Industrial Automation system inspired by the earlier word automatic (coming from automaton), was not widely used before 1947, when Ford established an automation system department in their country. It was during this time that industry was rapidly adopting feedback controllers, which were introduced in the 1930s. That improves productivity by taking over tasks that were performed by humans. Automation reduces employees. Furthermore, it is reliable and it reduces break down time from every side. At present condition engineers can monitor and control all the machine parameter from a single control room From Home and Office. With this system machine status can be recorded in a remote database and it can deliver a historical report anywhere. PLC (Programmable logic controller) is the main component of Industrial Automation process. We can make PLC Programming via using Personal Computer. Most popular brand of PLC, HMI, Servo Drive and inverter are Siemens, Mitsubishi, Yaskawa, Omron in Bangladesh.