Research the development of control system for small mechanical arms with a Smartphone operating system, Android. The main objective is to study the behavior of robots used in industrial plants, and small mechanical arm designed for use on the handle object. Position control system using the rotation of the servo motor with a microcontroller unit processed over a standard wireless receiver, Bluetooth applications on Smartphones, Android operating system. The functionality of the system starting from the connection with mechanical arms control system application via Bluetooth channel, then run the application and perform the desired command button is pressed. Such orders are sent to the control system to the command processor, microcontroller to control the servo motor is used as a mechanical arm's joints to rotate with different angles according to the received command. From the experiment found that users can use the application in the Android operating system, mechanical arms control handle objects in different positions and then place them in the designated position effectively. By the distance of the transmitter to control mechanical arms about 12 meters.