I. Introduction
Although there is a wide variety in development of science and technology around the world, the unmanned aerial vehicle(UAV) has become popular for almost every people and applied in every aspect of our modern life. In China, some of the peasant have already tried to use UAV to spray pesticides and herbicides, transport bags of crop or bottles of agricultural chemicals. However, even though the UAV path planning is thoroughly researched in literature, the peasant remained running the UAV manually in working. The path planning methods remain confusing and uncertain in real-world engineering problems. Therefore, the UAV path planning is still a hot spot in literature. More methods and verifications should be introduced to find a better, efficient, and confirmative solution for a given problem.