The aim of this research is to find out how and why the farmers adjust their proper cultivation-time to Lhosanfung(落山風), during each agricultural period from the interactions between human environment system and natural environment system. The outputs are: 1. The farmers harvest that are more durable and non-sensitive or less-sensitive to Lhosanfung and perform the proper cultivation actions during the main-Lhosanfung-period. From early November to mid December ever year. 2. The farmers cultivate earlier purposely sensitive or less-sensitive crops to Lhosanfung to avoid the Big-Lhosan attacks. These two facts show that there is obviously adapted development phenomenon of the agricultural activities in cultivation-time. The reasons that resulted in above phenomenon are: 1. Farmers seek for lowering the damages from the Lhosanfung attacks. 2. Farmers chase after the more benefits i.e. larger harvest to increase their motivate. 3. Farmers brought in new crops. 4.Farmers applied new scientific agricultural techniques, e.g. the deep well pump, agricultural mechanics. 5. It's related to farmers' perception to Lhosanfung.