The Lighting Detection and Orientation System is a lighting image sensor to detect the distribution and variability of total lighting. A digital image processor scheme with CPLD+DSP is used in the system,because CPLD is used as a complex programmable logic device and DSP is used as the abbreviation of digit signal processor. Image signal collection,decoder and memory are controlled by CPLD,which can reduce the area of circuit board and make the structure of circuit board easier;and large member of image data in real-time can be managed with DSP because of its high speed digital processor characteristic.