In this thesis, a system which maximizes luminous environment in building by efficiently using horizontal light shelf and LED is designed and im- plemented. The system is made of a zigbee-available sensor module part, step motor driver, and main board. LED dimming control can be achieved from 20 to 100 percent according to intensity and uniformity ratio measured by the sen- sor. The implemented system is well conducted and the performance will be proved by measuring the indoor luminous intensity.