This paper details the design, production and programming methodology of a five degree of freedom robotic arm system. All the hardware and software of the robotic arm have been designed by author and manufactured successfully by CIMS & Robotics Center of Shanghai University. It is the arm of a service robot which is to present the following functions: Chinese calligraphy, carry something from one place to another exactly, and other accurate positioning motion in space. The robotic arm system is based on five orthotropic digital DC brushless servo motors in mechanism, five digital servoamplifier and other devices. Our communication mode is Can-bus, the control software is designed by vb.net2005 language under the .net framework and emulation based on matlab.