Abstract: In order to improve the accuracy of creative knowledge acquisition in fuzzy front end(FFE) of customer collaborative product development, an acquisition method was proposed through combining the theory of fuzzy formal concept analysis(FFCA) and Fuzzy Cognitive Map, etc.. In terms of their divergent, novel, diversity, etc. characteristics, a knowledge representation method considering knowledge granularity was put forward through combining FFCA and ontology theory, this method could be used to deal with the representing difficulty of creative knowledge acquisition in FFE. In terms of the fuzzy characteristic, a similarity measuring method of creative ontology was proposed also, whose result would provide effective foundation to decide whether the creative knowledge could be acquired or not. Finally, the effectiveness of this knowledge acquisition method was verified through an example.