NET framework,this paper designs and codes a TCP program in C# to solve the problem of transmitting online data on network in security by using synthetically the strong points of symmetric algorithm and asymmetric algorithm.

Also by the separate index method of historical data and online data, the implementation of online data index is achieved.

The development and the problem of various online databases are different.

With the rapid increase of online databases, the large scale matching makes multiple sources schema matching method become the focus of the area of schema matching.

The equipment was developed by means of the integration of the techniques of computer on-line data-collecting and real-time supervision and control with the technique of fluidized drying.

To describe the method of realizing the online data management for blending and piling in Baosteel Raw Material Plant with Microsoft Access database management system, including data collection, man machine interface, data communication, data calculation, and report output.