The system of hydrologic information processing introduced in this paper is intelligent software for hydrologic data processing, which was developed by advanced program language-Visual Basic 6.0 in windows environment. The system applies the data from database and the results by Excel software. With the functions of automatically creating stage-discharge relation curves, indexes and cross-average sediment concentration relation curve, assisted with manual drawing, the system can complete total data processing and calculation. Consequently, the history of hydrologic data processing by hand has elapsed. Otherwise, the software has settled the difficult technical problem, which can complete drawing curves and calculating discharges and exporting results in succession. The computer-based automatization in hydrologic data processing is realized indeed.