In order to complete the spaceflight docking mission, address the problem of measuring the docking hole position under complex illumination conditions, design a docking hole position measurement system with dual band and dual channel based on the heterogeneous. The binocular distance measurement system of light source and its distance measurement error compensation method are studied. After introducing the binocular ranging and error compensation principle of heterogeneous light source, according to the visible, near-infrared and binocular ranging characteristics and error analysis results, using neural network to fuse and compensate the data from different light sources to achieve position measurement of docking holes under weak light, strong light and no light conditions. Through the experimental test, the results show that in the measurement range of 0 ~ 10 m, the relative measurement error of the system under normal light conditions is basically in the within 1%, the relative measurement error under low-light conditions is basically within 2%, which is 8% ~ 9% and 4% ~ 5% higher than that of monocular and binocular distance measurement respectively. The function of higherprecision distance measurement under different lighting conditions is better realized.