The invention is applicable to the technical field of management of military materials, and provides a detection device of military electronic equipment, and a detection method and a detection system of the detection device. The detection method includes the steps as follows: when an environmental parameter sampling value and an operating parameter sampling value of the military electronic equipment are not beyond the ranges of corresponding prestored thresholds respectively, an environmental parameter contribution value and an operating parameter contribution value are calculated; the environmental parameter contribution value and the best prestored environmental parameter contribution value are subjected to variance processing, and the operating parameter contribution value and the best prestored operating parameter contribution value are subjected to variance processing to obtain an environmental parameter variance value and an operating parameter variance value; and a comprehensive health reference value of the military electronic equipment is calculated in combination of a weight processing mode to realize automatic comprehensive analysis of a current operating condition of the military electronic equipment and avoid the problem of poor reliability of an analysis result in a conventional manual mode, so that the popularization and the application of a product are facilitated.