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This paper reports the development of a rice transplanting robot guided by a real time kinematic global positioning system (RTKGPS) and an inertia measurement unit (IMU) using the controller area network (CAN). The project aims to develop an autonomous agricultural system for the operation in paddy fields. The rice transplanting robot is the first step in the achievement of the project. The RMS lateral deviation was observed to be less than 0.04 m in a field experiment. This rice transplanting robot can record the various working data like working path, time and GPS quality. These information can use for disclosure of cultivation history. It can contribute to credible food safety system.