| For computer's merits such as: high running speed, accurate calculation, enormous data capacity and so on, it has become an absolutely necessarily tool in geophysics data processing fields. As a result, there are many kinds of gravitational and magnetic data processing programs. They works on different operation systems. Their methods of input and output are not the same and data are saved as files. All of these are very inconvenient for the use of these programs and the management of data.In order to resolve these questions, based on the methods and principles of normally gravitational and magnetic data processing, I design and develop a system of gravitational and magnetic data processing. This system works on Windows operation system, takes Microsoft Access 2000 as background database, and uses Delphi 7.0 as program tools. The system includes the following six modules: data input, data processing, data output, database management, data query, and user management. The main contents include: integrate many kinds of gravitational and magnetic data processing software, visualize the software worked on DOS, design many kinds of program for data format change among these software, unify the data format for input and output to integrate in a system, in addition to renew and perfect some data procession program, take database to manage gravitational and magnetic data, so it can be backup, delete and output with different formats. Moreover, data in table can be query in complicated condition and sort in different condition. User's login name and authority are managed too.In the integration of system and visualize of program, try a faster method. Firstly, modify the way of parameter reading in these programs written in different language to reading from files. Then create temporary command files (includes parameters) in visualized operation interface of the new system, and call these executable programs. At last delete the temporary command files. In the condition of not modifying functions of original programs, this method not only keeps the accuracy of data processing but also increases the efficiency of program design. Through the design and development of gravitational and magnetic data processing system, introduce the related technology of information system into the work of data processing. Moreover, research primarily on system method of gravitational and magnetic data processing. The merits of this system are as follow:1. The application of system method reduces the human factor in the process and errors. At the same time, improve the accuracy and efficiency. 2. Friendly system interface and user operation interface make data processing more easy and direct. During importing data into database, the validity of data fields checking assure of the valid of original data. User manage mechanism ensure the security of data for sharing.3. Through directly calling external executable software by API interface, expand the function of data process and take maximum use of available software. The final results can be exported in many kinds of formats user needed. This makes system more flexible. In the application of this system, take the E.lon.and the N.lat , just the Sinkiang region as research area. The Bougue gravitational anomaly data come from the scale of 1:2500000 Bougue gravitational anomaly map of the People's Republic of China. When research the crust structure of Sinkiang, separate the deep gravitational anomalies from the shallow. According to this, calculate the depth of Moho interface and inverse its shape. The physiognomy structure obviously shows "Three Mountains and Two Basins ": Kunlun mountains, Tianshan mountains, Altai, Tarim basin, and Zhunggar basin. According to the result of data processing, demonstrate that the deviation of crust structure of Sinkiang as: Kunqi structure belt, Tianshan mountains structure belt, Altai structure belt, Tarim palaeocontinental crust and Zhunggar palaeooceanic crust is reasonable.Based on the depth of Moho interface of Sinkiang region, draw a c...
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