The coordination was divided into management coordination, technology one and human-computer one, and the concept of supply chain coordination was defined.  The value differences of information sharing under some dissimilar conditions were analyzed, and the relation between supply chain coordination and information sharing was discussed.  It is pointed out that the information sharing is a necessary but insufficient condition for supply chain coordination and that the supply chain coordination is not implemented through the information sharing under some conditions.  It is necessary that the information sharing be reasonably designed in advance.