Abstract: GPS location module was designed according to GPS principle and applied in location and navigation of mobile robot. Some tests were done about the mobile robot with the GPS location module indoors and outdoors through setting starting point and destination of moving path of the robot. The result file of outdoor test is introduced into Google maps, so as to generate moving track and observe location of the robot in Google maps real-timely. The indoor test data is processed by Matlab with a result showing the GPS location module can realize path replaying function of the mobile robot indoors.