Abstract: In modern experiment teaching and data processing technology，there are many non-linear function verification′ s experiments. It is difficult to use the traditional method to determine the function relation with drawing process，and it leads to a large amount of calculation and poor efficiency，it is easy to have error. Origin software drawing，linear fitting，normalization treatment，Lab Talk programming functions have been used to deal with experimental data of light intensity response rate in spectrum detection system，and finally obtains the light intensity response rate. It is simple， accurate and directviewing to deal with data with Origin software，and it is convenient for theoretical analysis and experiment teaching of optics.

Key words: Origin, linear fitting, normalization processing, Lab Talk programming, light intensity response rate