The invention provides a device, a method and equipment for detecting the intensity of an infrared signal. The device comprises an infrared signal detecting unit, a signal processing unit and an LED digital display unit, wherein the infrared signal detecting unit is used for detecting the infrared signal; the signal processing unit is used for sampling, quantizing and coding the input signal; andthe LED digital tube display unit is used for displaying the intensity value of the quantized and coded signal. The installation and the adjustment operation of the infrared detection equipment are more convenient by sampling, quantizing and coding the detected infrared signal and displaying and outputting the intensity of the infrared signal by using the LED digital tube display unit, and thus, the security cost of users can be effectively reduced.