In order to improve the operational efficiency of the substation staff switching, reduce labor costs and reduce the power accident caused by misuse, developed a service robot. The robot local side is based on Android software, combined with operation ticket tasks and an innovative positioning method based on scan code, making sure that it can accurately reach the appropriate workplace and assist staff complete switching operation. The paper takes fuzzy PID control algorithm to ensure the robot run along the predetermined path. Staff can monitor the actual state on remote terminal, which is based on LabVIEW software. After put into operation, the service robot can help to improve work efficiency, reduce power accidents, promote the intelligent development of the power grid, and it has huge application prospects