Abstract: As an important means of large-size non-contact measurement, the measurement precision is affected by the accuracy of the instrument, the correctness of personnel operation and the integrity of measurement methods. The intersection measurement error of the electronic theodolite measuring system is analyzed. Firstly, the measurement principle of electronic theodolite measuring system is introduced. Secondly, the effects of different factors on the measurement results are analyzed and compared.The results showed that the analysis has a value for applications, and provided a reliable basis to improve the measurement precision.

Key words: Electronic theodolite, Intersection measurement, Error analyzing