The utility model provides a computer lab environmental monitoring device based on internet of things, including perception layer and internet, perception layer include a plurality of computer lab operating environment monitoring device, computer lab operating environment monitoring device include that temperature measurement alarm device, humidity measure alarm device and cigarette mist concentration measures alarm device, and have a computer lab operating environment monitoring device connection control air conditioner at least, the internet include ethernet, CAN bus and wireless WIFI, perception layer pass through the communication of internet and monitor terminal, realize long -range monitoring alarm and multinode network deployment. The utility model discloses have higher flexibility and practicality, can guarantee the operating environment safety of computer lab, reach unmanned on duty, real -time centralized monitoring's purpose.