In this study, we developed a simulator that can measure each joint angle in real time by using an RC toy excavator with the same viewpoint and operating interface as a real excavator. We calculated the evaluation indices for lever operation and bucket movement using the proposed system and a real excavator and determined the indices of operation skills with high correlation between the RC toy excavator and real excavator. The preliminary experimental results were explained in IROS2019 (Sekizuka et al., 2019). The new contributions of this paper are a comparison of the behavior of our RC excavator and that of a real excavator, a subjective evaluation of the operability and the reality of the field of view of our RC excavator system, and verification of skill evaluation indices including a new index for lever operation