Database technology is very useful in realizing MT data management. In this paper, a visualized systematic frame of MT data processing is described for the first time. On such a basis, the emphasis is placed on the process of constituting the database platform with the Paradox database system. With mixed language programming and Windows API technology for realizing the utilization of Fortran and Surfer in Delphi, this paper also deals with the implementation scheme of MT data processing function. A visualization program of MT data processing based on such objects as survey area, survey line and survey point is realized.