Abstract: Based on APOSOS (asia-pacific ground-based optical space observation system) project, the first 15 cm ground-based space debris photo-electric telescope manufactured by China was firstly installed abroad and obtained much observational data. The paper calculated and analyzed the observational accuracy of observational data using two accuracy estimation criterion-internal fitting accuracy and external fitting accuracy estimation, and the result of internal fitting accuracy is on 5 arc seconds; then, obtained precise orbit of satellite Lageos1, Lageos2 and Ajisai derived from precise orbit determination which made use of satellite laser ranging normal point data from International Laser Ranging Service(ILRS), and the analysis of external fitting accuracy was based on the precise orbit, the result of external fitting accuracy was around 6 arc seconds. All the results indicate that APOSOS 15 cm opto-electric telescope has relatively high observational accuracy and reaches the design specification, which can satisfy the demands for science and engineering application.