In greenhouse, the robot sprayers give rise to concern as they  reduce the labor intensity and improve the accuracy of  the spraying. This paper details the progress to date in the development of a precision robot sprayer. The precision robot sprayer is able to adjust both liquid and air volume to match, the branches contour and location of the greenhouse crops with two ultrasonic sensors  which ensures the position of the plants in the greenhouse. The spraying robot with the technology of wind-assisted delivery to enhance the effective utilization rate of the pesticide.  The liquid flow  of  nozzles can also be adjusted according to the crops exuberance¡£Robots achieves independent navigation walking using four methods, and relying on tracking sensors. In the test of the spray uniformity and the effectiveness£¬the results indicate that the spraying robot operation has a good performance in the working process in the greenhouse, saving money , time, fuel and labour .