The utility model discloses a single lamp intelligence lighting circuit, this circuit of is mainly by the triplex: sensor portion branch, control circuit and LED lamp bead array, wherein, sensor portion divides including human body infrared induction module and ambient brightness response module, realizes the intelligence response to the environment, the control circuit part is used for realizing switch and the adjustting of the lighteness control to the LED lamp including LED drive circuit, switch control circuit and the control circuit triplex of adjusting luminance, ON -OFF control circuit plays the effect of main switch, controls lighting of LED lamp bead array and goes out according to the power of indoor light, light modulation control circuit gathers the information that human body infrared induction module transmitted, carries out the linearity to the LED lamp and adjusts luminance, realizes LED lamp 100% luminance on the pearl and 15% luminance two types's on the LED lamp pearl switching, the sensor portion branch is connected switch and the adjustting of the lighteness of back through LED drive circuit control LED lamp bead array with ON -OFF control circuit and light modulation control circuit. This device can be realized single lamp intelligent regulation, practice thrift the operation cost.