Alexander Izotov’s name, the largest Soviet scientist in the field of a theoretical and practical geodesy, the student of Feodosiy Krasovsky and his associate, has for ever become historic in development and achievements of the Soviet geodesy. A. A. Izotov’s after death of F. N. Krasovsky’s not only continued their research, but also put new scientific problems in the field of geodesy, geodynamics, searched for ways of solving the complicated questions facing the surveying industry. He belonged to the glorious constellation of geodesists, whose profession was mode of their life. Unique and distinctive identity not only as a scholar but also a personnality attracted his young employees. А. А. Izotov possessed unique consistence and persistence in supporting the scientific views, no matter the posts and merits of the opponents.