By the observation of geophysical field parameters such as seismic velocity, density, magnetism, and electrical conductivity, we have obtained the physical properties and structure features of the earth's crust and upper mantle. Thus scientific evidence further facilitates the understanding of the earth's interior status, the process and mechanism of the movement of crust, and other scientific subjects. Furthermore, such useful information can also lead to the exploration of large-scale mineral deposits. As a primary geophysical method for the detection of the electrical structure of the earth's crust and mantle, magnetotelluric exploration has been widely adopted both in China and foreign countries, and numerous significant research results have been acquired. The seismic and magnetotelluric methods are recognized as two of the dominant methods on the study of the structure of the earth's crust and mantle. They have been proved to be very effective in solving worldwide continent dynamic problems by numerous application cases. However, because the natural electromagnetic field tend to be affected by noises, it is difficult for the MT method to acquire ideal data with high signal-to-noise ratio in the mineral-enriched areas with strong noises. At the same time, the technique of constraining inversion and joint interpretation for seismic and MT data is still not ready for utilization. All the reasons mentioned above limit the accuracy of the process and interpretation of MT data. The project of "experiment and integration of deep detection technology" belongs to the "SinoProbe" project. It takes different areas with both complicated geological conditions and different situation of man-made noises, like the Tibet plateau, the western orogen, and the mountain areas with crystallized rocks in the south china, as target area to study the integration of geophysical techniques for detailed deep detection by utilizing the seismic and MT methods. The electrical structures of these areas are given from the results of the experimental profiles. The subject, which is named "the MT observation experiments and the study of electrical structure of the earth's crust and mantle", will focus on the study of suitable MT acquisition and computation techniques for different noise environment and geological conditions. The constraining inversion and joint interpretation of seismic and MT data will also be discussed. This study aims to enhance the accuracy of deep geophysical detections, and provide examples for the integration of deep geophysical detection techniques and regional geophysical detection with high accuracy. The MT observation experiments located in the northeast edge of Tibet Plateau, the west Qinling Orogen, and the mountain areas with crystallized rocks in Fujian province has accomplished. The result shows that, in these areas with typical geological structures, though difficulties exist during the acquisition, and the noise is very strong in some areas, it is still possible to acquire the MT data with high quality and consequently get a reliable model of the underground electrical resistivity by choosing proper technique for field observation and taking discreet computation. The results from this experimental project will become important technical support and insurance for the realization of the scientific objectives of the “experiment and integration of deep detection technology” project.