The positioning area is firstly determined according to the constructed lighting model based on the lighting lamp light path, and positioning vector is built. The analysis of indoor lighting lamp scene classifies the positioning scene into three classes, the regional position of the target is realized by respectively using positioning vector method in the first class and the second class, and the target position is achieved in the third class by using common three edge position method. Finally, the positioning results are further optimized by using precise calculation method of linear least square according to the deviation produced in experiments in actual environment.