Temperature field drawing based on the wireless sensor networks is discussed.Wireless temperature sensor nodes collect environmental temperature information

and then sent to the Sink node via Zig Bee wireless networks

and then connect the computer through the serial port on the computer for data processing.The system components and data acquisition is detailed described

data fusion in data processing is analyzed.The Kriging interpolation methods in geographic information systems is used for data interpolation

and finally VC++ and OpenGL are used to realize and draw the image temperature field of graphics.The results show that the system application is reliable and temperature field graph drawing is accurate.