A robot which could spray chemicals under grapevine trellis was developed and experimented. From the experimental results, it was observed that the robot system made precise spraying operation and its precise operation record possible. Based on the precise operations and records, an optimum management of chemicals could be expected, that is, necessary amount of chemicals would be sprayed only at necessary places for protection of environment and ecosystem. In addition, it was considered that this robot would be able to contribute the minimum input-maximum output production system by establishment of traceability system in grape production.