An LED street lamp comprehensive monitoring and managing system disclosed by the present invention relates to the street lamp management technology field, and comprises a processor, a parameter information database and a sensing and detecting unit. The sensing and detecting unit comprises a temperature sensor used for detecting the temperature in a lamp, an illumination sensor used for detecting the illumination of an LED street lamp, a humidity sensor used for detecting the air humidity around the lamp and a wind speed sensor used for detecting the air flow velocity around the lamp and is connected with the processor via an A/D converter, and the processor is connected with an LED lamp via a lamp control unit, is also connected with a display device and is connected with the parameter information database via a data extraction module. According to the present invention, by the comprehensive use of the processor, the parameter database, the illumination sensor and a power detection unit, the light decay of the LED lamp is analyzed, and the light decay situation of the LED lamp is obtained conveniently and timely.