Abstract: Aiming at the problems with enterprises’ taking different reliable marketing strategies to maximize the customer value, it researched the extension knowledge mining software for customer value, based on extenics theory and extension datamining technology, described the software architecture and the designing principles of the main function modules, thus acquiring extension classification knowledge. The experimental results show the software has general and flexible ability concerning such aspects as data processing，the establishment of the evaluation system and calculation of the customer value, so it can satisfy different enterprises’ demands.

Key words: customer value; enterprise; extension knowledge; extension data mining; software