Despite the widely recognised importance of knowledge as a vital source of¡@competitive advantage, there is little understanding of how groups actually create and manage knowledge dynamically. Knowledge conversion is a continuous, self-transcending process through which one transcends the boundary of the old self into a new self by acquiring a new context, a new view of the world, and new knowledge. An organisation creates knowledge through the interactions between explicit knowledge and tacit knowledge. Through the conversion process, tacit and explicit knowledge expands in both quality and quantity. There are four modes of knowledge conversion. They are: (1) socialisation; (2) externalisation; (3) combination; and (4) internalisation. We try to use the conversion model to be our theorical base. And use grounded theory to be out research mehod. Through the real data, we come out some factors impacting the Information System Develop Team¡¦s knowledge conversion.