The invention belongs to the technical field of computer software and discloses a psychological evaluation system and a method based on semantic analysis. The information data processing terminal comprises an information and parameter setting module, an item bank and a topic presentation module, a data acquisition module, a data processing module, a corpus and a normal module, a semantic network calculation module and a visual feedback module. The invention applies semantic network theory, text mining and other methods to creativity evaluation, and develops evaluation software suitable for on-line evaluation and computer scoring, which is superior to the traditional paper-pencil test to a certain extent. Supported by experimental evidence, individual evaluation is based on large sample norm data, simple and friendly, which can be widely used in scientific research of creativity, innovative education of schools, selection and evaluation of R&D personnel of enterprises, and so on, to provide support for the construction of 'innovative country'.