Objective  To acquire the corneal data automatically by designing and developing corneal data analysis software with the Orbscan II corneal topography system， providing automatic analysis function for corneal clinical diagnosis. Methods  Based on the existing corneal topography system， the corneal data analysis software hooked the process of the Orbscan using API Hook. During the measurement of the cornea， the program acquired the corneal data in real time， and through sharing memory file， took the data into the program process of the corneal data analysis software to realize collection， acquisition and analysis of the corneal data. Results  The acquired data were carried out partial differential analysis and regression to calculate and produce Q-value of the 360 semi-meridian. It used OpenGL graphics technology to vividly demonstrate aspheric properties and morphological images of individual corneal surface in VC++ 6.0 development environment. Conclusion  The corneal data of the Orbscan II corneal topography system could be obtained automatically by the analysis program， which achieved seamless connection of software development， provided the actual three-dimensional corneal morphology and Q-value distribution curve for patients， better extended the function of the corneal topography system， and provided the data foundation and automatic analysis function for the further study of cornea.