Greenhouse temperature alarm device and method

The invention discloses a greenhouse temperature alarm device and a greenhouse temperature alarm method, and belongs to the technical field of temperature alarm. The device comprises a temperature-monitoring terminal and a temperature acquisition and information transmission controller, wherein the number of the temperature-monitoring terminal is at least one, and the temperature-monitoring terminal comprises a central processing unit, an input/output interface, a temperature sensor, a wireless data module and a display screen; and the temperature acquisition and information transmission controller comprises a wireless data module, a GSM module and a PC. The device controlling method comprises a method for controlling the temperature-monitoring terminal and a method for controlling the temperature acquisition and information transmission controller. The greenhouse temperature alarm device has the advantages of cost conservation, high circuit safety, simple and practical operation, strong expandability and high response speed.