A plurality of sub nodes are distributed in the ponds around for data collection,communicating with the master control computer via wireless,data deliver from sub nodes deal with and display by PC,controlling the status of sub nodes at the same time,for instructing the Water temperature,pH,oxygen content and adjusting the oxygen content in the ponds. The whole system is divided into GSM message part,PC interface management part,master controller and slave controller.By the use of the design,fish farmers can...