The current skill evaluation of GMDSS certification is mainly carried out by human being, which involves many man-made factors, and is hard to test the real level of personnel being assessed. Due to this fact, the present study designs an automatic evaluation system. Based on a B/S structure, the system realizes an automatic assessment content algorithm according to category and area. It simulates the real communication equipment, and at the same time records, assesses and plays back the whole evaluation process, which can effectively improve the accuracy of evaluation. Finally, an example is given to test the effectiveness of the system.