In view of the existence of a series of common problems in the current geophysical database system, such as the complexity of professional data structure design, the requirement of data processing and the lack of effective management of specific outcome data, the authors carried out the design and implementation of Magnetotelluric Sounding (MT) result database based on the deep lithosphere structure. On the basis of the basic theory of MT, database technology and computer technology, the authors collected, trimmed, analyzed and modeled MT data that are the major regional deep exploration data, and, on such a basis, designed and developed the MT database system based on SQL Server 2005 and Visual Basic 6.0. Some basic functions of the system that include retrieval, query, edition, and input / output can be achieved quickly and easily, and other functions of the system that include MT storage and visualization can be operated as well. Meanwhile, this MT database system can play an important technical support role in the study of China's lithosphere structure and geodynamics as well as the study of tectonic evolution of the Earth.