Data mining of qualification expertise plants varieties plants examination for fit of dissemination results. Determine and justify the composition of Data Mining’s methods and tools (application package) which should be used for data processing result of science research for the DUS and VCU tests. The article considers description Data Mining tools which suitable for agricultural data processing. Has been decomposed information system to eleven tasks. For each task was offered more suitable mathematic and statistic methods. A comparable analysis of data processing tools has been intended. For the experimental data of field studies processing has been recommended to use statistical processing by MS Excel, R, SPSS. It is recommended to use these software products due data processing of the qualification examination results, which increases the reliability of the results obtained and contributes to a more objective selection of plant varieties when introducing in the State Register of plant varieties suitable for distribution in Ukraine.