An LED street lamp and an LED street lamp monitor system based on a sensor network

The utility model provides an LED street lamp comprising an LED lamp array, a drive circuit carrying out dot matrix type lightening control on the LED lamp array, a clock chip providing clock signals, an illumination detection circuit module, a temperature detection circuit module, a pyroelectric infrared sensor, a microprocessor, a memory connected with the microprocessor and a switch power supply module supplying electric power. The utility model also provides an LED street lamp monitor system based on a sensor network. The LED street lamp monitor system based on the sensor network comprises a monitor host machine and nodes composed of a plurality of LED street lamps. The monitor host machine and the nodes together form a chain-shaped network. According to the utility model, brightness and illumination beginning time of the LED street lamps are controlled according to acquired data of illumination, time, temperature, etc.; energy saving purposes of illumination according to needs are realized; temperatures in lampshades can be detected; the lamp arrays can be protected; and LED usage life can be prolonged.