Along with the new campus building, campus continues to expand, network application is continuously increasing, the emergence of a number of network computer room. On the basis of network computer room temperature and humidity requirements, in order to prevent computer equipment due to environmental factors such as temperature and humidity failure occurs, the application design of wireless sensor network monitoring system of temperature and humidity. Hardware design of the networking mode, temperature and humidity collection node, data receive node. Softwares are designed for node control program, transducer, transceiver, communication channel initialization procedures, to achieve parameter transmitting, receiving, processing. And the field test, the test results and room temperature and humidity.