Abstract: Under the same hardware conditions, the systematic characteristics such as the linear area and the responsivity of a four-quadrant optoelectronic detector changes as the algorithm changes. The common algorithms for laser spot positioning were analyzed. The correction curves for the displacement of Gauss laser spot were deduced with two-dimensional numerical integration and curve fitting, and a high-precision digital four-quadrant optoelectronic position detection system was designed and fabricated. The theoretically deduced result was verfied by the detection system.