The computer-aided gem identification information system for teaching based on group grey relational grade analysis is designed for teaching reform and cultivating innovative practice ability. Computer-aided identification for gem testing is realized in judging by multispecies and multiparameters. The group grey relational analysis method improves the accuracy and reliability of the grey and reduces the required data precision in the standard state model compared with the traditional grey relation analysis method, thus achieving better gem identification capability and reliability. With popularization value, the system breaks through the traditional mode of education and provides a convenient platform for resources sharing and supplementary identification.